NCERT Solutions Class 4 Mathematics Chapter 3 A Trip To Bhopal

Page 23

I_______33

II_______32

III_______42

IV_______50

V_______53

Total 53

So there are a total of 210 children going.

Q.If they get 4 buses, how many children will get seats?

Ans. Number of children who will get seats = 4x50 = 200

Q.Will there be any children left without seats?

Ans. Yes, there will be 10 children left without seats.

Q.How many mini buses are needed?

Ans. Mini buses needed =210 ÷ 35 = 6.

Page 25

The Journey Begins

Q.If they go to Bhimbetka, they will reach there

– Before 10 o’clock

– Between 10 o’clock and 11 o’clock

– After 11 o’clock.

Ans. They will reach Bhimbetka between 10 o’clock and 11 o’clock.

Page 26

Q.Was Victoria right?

Ans. May be Yes.

Q.Ms. Asha-See, our bus is about 5 metres long. Imagine how many buses can stand in aline on this bridge.

Ans. 100.

Q.Have you ever crossed a long bridge? About how many metres long was it?

Ans. Yes, I have crossed a long bridge. It is about 500 metres long.

Q.What is the difference between the water level of the Narmada in the rainy season and now?

Ans. The difference in the water levels of the Narmada is (40 – 15) metres = 25 metres.

Page 27

Q.Each bus takes about 15 minutes to refill and there are two buses to be refilled. So they stopped there for about 2x15=30 minutes, which means they are late by about 30 minutes.

Q.Look in the picture and find the price of 1 litre of diesel.

Ans. The price of 1 litre of diesel is Rs. 35.

Q.How much time did aman take to come out of the toilet?

Ans. Aman took 156 minutes to come out of the toilet.

Page 28

To Bhimbetka

Q.How many more deer are there than bisons?

Ans. 117 – 37 = 80.

Q.How many people Bonomala must have counted?

Ans. Bonomala have counted either 154 or 184 or 177.

Q.What time is it?

Ans. 12 o’clock.

Page 30

Lunch Time

Q.How many oranges, biscuits and bananas are distributed?

Ans. Number of oranges distributed = 210x1=210

Number of biscuits distributed = 210 x 5 = 1050 

Number of bananas distributed = (210-38) = 172

Q.Manjeet – Right OK! You ask now.

Other children also join in. Everyone is asking puzzling questions.

(A)I gave four toffees to each to four of my friends and three toffees are left with me. How many toffees did I have?
Ans. Number of toffees given to 4 friends at the rate of 4 toffees per friend = 4 x 4 = 16 

Toffees left over = 3

Number of toffees I had originally = 16 x 3 = 19 

(B)What numbers can you make using 3,5 and 7? You can make 357 and 537. What others?

Ans. Three digit numbers made by using 3, 5 and 7 without repetition are 357, 375, 537, 573, 735, 753. These are six in all.

(C)A number becomes double if it is increased by 8. What is the number?

Ans. Let the number be x. then, as per question, we have.

2x = x+8

2x-x = 8

X = 8

Thus, the required number is 8

(D)Think of a number which can be divide by 2, 3 and 5 and comes between 25 and 50.

Ans. A number which can be divided by 2, 3 and 5 and comes between 25 and 50 is 30. Because the required number must be divisible by, i.e., 30, and 30 is the only number between 25 and 50 which is divisible by 30.

(E)A small ant climbs 3 cm in 1 minute but slips down 2 cm. How much time will it take to climb 2 cm?

Ans. Let us represent this problem by a diagram.

Clearly, it takes 2 minutes to climb 2 cm.

OR

Net height attained in 1 minute = (3 -2) cm = 1 cm

Therefore, 2 cm height will be attained in 2 minutes.

page 33

Which Boat do we Take?

Q.Indra and Bhanu first went in the motor-boat, then they took the oarboat.

How much did they pay in total for both the boats?

Ans. Total amount paid for the motor-boat and the oar-boat by Indra and Bhanu

= Charges for the motor boat + Charges for the oat – boat

= Rs. (2x50)+ Rs. (2x15)= Rs. 100+Rs. 30 =Rs. 130

Q.How much time did they get for boating?

Ans. Total time for boating in case of Indra and Bhanu

= 20 minutes + 45 minutes + 65 minutes + 1 hour 5 minutes.

Q.One group of children went for the double-decker trip. They paid Rs. 450 in total. How many children went for the double-decker trip?

Ans. Total charges paid= Rs. 450

Charges for one child= Rs. 30

Therefore, number of children who went for the double-decker trip

=450 ÷ 30 = 15

Q.Which boat makes two trips in 1 hour?

Ans. Time taken for one trip = 1 x 60 minutes ÷ 2 

= (600 ÷ 2)minutes

= 30 minutes.

Clearly, from the table we find that the paddle-boat makes two trips in 1 hour.

Q.Which boat takes less than half an hour to complete one trip?

Ans. In boat with oars they get the most time in the least amount of money.

Q.Javed went twice for boating. He paid a total of Rs. 40 and boated for 50 minutes. Which two boats did he take?

Ans. Javed took paddle-boat and motor-boat for boating.

Page 34

Practice Time

1.There are four very old cave paintings. Mark the oldest.

(a) 4,200 years old

(b) 8,500 years old

(c) 1,000 years old

(d) 1,300 years old

Ans. (c)is the oldest painting.

2.One bus can carry 48 children. How many children can three buses carry?

Ans. Number of children carried by one bus = 48

Number of children carried by 3 buses =

3.Which pair of number add to make more than 500?

(a) 152 and 241

(b) 99 and 229

(c) 321 and 192

(d) 401 and 91

Ans. (b) since 321 + 192 = 513

4.What happened at what time? Draw lines to match.

Crossed the Narmada bridge 3:00 p.m.

Looked at Bhimbetka paintings 6:00 p.m.

At the petrol pump 9:10 a.m.

Boating in the lake 12:30 p.m.

Had lunch 11:30 p.m.

Retuned to Hosangabad 9:30 a.m.

Ans. Crossed the Narmada bridge 9:10 a.m.

Looked at Bhimbetka paintings 11:30 p.m.

At the petrol pump 9:30 a.m.

Boating in the lake 3:00 p.m.

Had lunch 12:30 p.m.

Retuned to Hosangabad 6:00 p.m.

Question. This is the score-card of a recent World Cup match between India and England. Study it carefully and answer. What was the total number of balls faced by the last five batsmen?

(a) 22
(b) 38
(c) 46
(d) 47

Answer : C

Question. This is the score-card of a recent World Cup match between India and England. Study it carefully and answer the question. The Fall of Wickets shows the scores at which different wickets fell. How many runs were added between the fall of the 4th and 5th wickets?

(a) 52
(b) 60
(c) 152
(d) 62

Answer : D

Question. 7 +  200 +  30 can be named as
(a) Seven hundred and twenty three
(b) Nine hundred and thirty
(c) Two hundred and seventy three
(d) Two hundred and thirty seven

Answer : D

Question. Counting BACKWARDS, Jaya wants to write down all numbers from 600 to 1. (600, 599, 598,....and so on up to 1.)  among the following numbers, which one will come first in her list?
(a) 445
(b) 544
(c) 545
(d) 454

Answer : C

Question. How much more is 48 TENS than 43 TENS? 
(a) 5
(b) 48
(c) 50
(d) 91

Answer : C

Question. The sum of 435 and 345 is equal to
(a) 700 + 70
(b) 800 + 70
(c) 700 + 75
(d) 700 + 80

Answer : D

Question. The number which comes after the smallest three-digit number is
(a) 11
(b) 99
(c) 101
(d) 1000

Answer : C

Question. 69□ 69 = 0
Which symbol comes in the empty box?
(a) +
(b) ÷
(c) x
(d) -

Answer : D

Question. 400 - 394 is the same as 200 - _________?
(a) 394
(b) 294
(c) 194
(d) 94

Answer : C

Question. Which pair of calculations gives two different answers?
(a) (16 + 9) and (9 + 16)
(b) (9 ÷ 3) and (3 ÷9)
(c) (7 x 3) and (3 x 7)
(d) (5 + 4 + 11) and (4 + 11 + 5)

Answer : B

Question. Which of the following is NOT equal to 54 + 23?
(a) 23 + 54
(b) 5 + 4 + 2 + 3
(c) 70 + 7
(d) 4 + 50 + 3 + 20

Answer : B

Question. If we start subtracting 5 from 24 stepwise as shown, we will be able to subtract 4 times. If we start subtracting 7 from 143 in a similar manner, how many times will we be able to subtract?

(a) 14
(b) 20
(c) 40
(d) 70

Answer : B

Question. Which of these numbers is nearest in value to 900?
(a) 800
(b) 898
(c) 910
(d) 904

Answer : B

Question. What will we get after adding EIGHT THOUSAND TWENTY EIGHT AND TWO HUNDRED NINETY.
(a) 82118
(b) 9928
(c) 8310
(d) 8318

Answer : D

Question. How much is less than 234 from 406
(a) 232
(b) 272
(c) 132
(d) 172

Answer : D

Question. Which of the following numbers comes  between 798 and 978?
(a) 789
(b) 897
(c) 987
(d) 788

Answer : B

Question. This is the seating arrangement for students in a classroom with each box showing one chair. The chairs which have a cross mark are occupied. Which of these is TRUE?

(a) More chairs are occupied than empty.
(b) Nine chairs are unoccupied.
(c) Every student has a partner sitting next to him or her.
(d) The number of occupied chairs is less than 10.

Answer : D

Question. Of the following, 27 + 49 is nearest to
(a) 60
(b) 70
(c) 80
(d) 100

Answer : C

Question. The number which comes after the smallest three-digit number is
(a) 11
(b) 99
(c) 101
(d) 1000

Answer : C

Question. A certain number is shown on the abacus below. A better way of showing this number on the abacus is:

b

Question. 1000 is equal to
(a) 111+ 999
(b) 119 + 991
(c) 91 + 919
(d) 9 + 991

Answer : D

Question. Which of these is closest to 341?
(a) 34 ones
(b) 34 tens
(c) 43 tens
(d) 3 hundreds

Answer : B

Question. Sudha read 25 story books in the summer holidays this year. She read 6 books more than Gurpreet did and 7 less than Nadira. How many books did the three of them read altogether in the summer holidays?
(a) 24
(b) 38
(c) 74
(d) 76

Answer : D

Question. 4 ones + 20 tens + 30 is
(a) 54
(b) 234
(c) 630
(d) 900

Answer : B

Question. How much more than 195 is 300?
(a) 105 more
(b) 215 more
(c) 295 more
(d) 495 more

Answer : A

Question. Which is the greatest three-digit number that has three different digits?
(a) 998
(b) 987
(c) 978
(d) 901

Answer : B

Question. 99 more than 708?
(a) 7917
(b) 1698
(c) 807
(d) 797

Answer : C