CBSE Class 10 Mathematics Sample Paper 2015 Set L

1. The sum of roots of the quadratic equation 2x² + 13x + 11 = 0 is

(a) –13

(b)-13/2

(c) 11/2

(d) –11

2. n th term of the A.P. –5, –3, –1, ............. is

(a) 2n – 7

(b) 7 – 2n

(c) 2n + 7

(d) 2n + 1

3. In the given fig. P, Q and R are the points of contact. If AB = 6 cm,BP = 3 cm, then the perimeter of ΔABC is

(a) 12 cm

(b) 18 cm

(c) 9 cm

(d) 15 cm

4. The tops of the two poles of height 8 m and 12 m are connected with wire. If wire makes an angle 30° with the horizontal, then the length of wire is–

(a) 10 m

(b) 12 m

(c) 8 m

(d) 4 m

5. The distance between the line y + 3 = 0 and 2y – 5 = 0 is–

(a) 8 unit

(b) 11/2 unit

(c) 6 unit

(d) 5 unit

6. The probability of a question calculated to be right is .x/12 If the probability of the question calculated not to be right is 2/3 then x = ........

(a) 2

(b) 3

(c) 4

(d) 6

7. If –9, –14, –19, ............... is an A.P. then the value of a₃₀ – a₂₀ is

(a) –50

(b) 50

(c) 10

(d) None of these

8. A right circular cylinder of height 45 cm and radius 4 cm is made by melting of spheres of radius 6 cm each. Find the number of spheres.

(a) 3

(b) 4

(c) 5

(d) 6

9. At any instant, the shadow of a pole is equal to its height, the angle of elevation of the sum is

(a) 30°

(b) 45°

(c) 60°

(d) 90°

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