60
Q:

# 50 men took a dip in a water tank 40 m long and 20 m broad on a religious day. If the average displacement of water by a man is 4 cu.m , then the rise in the water level in the tank will be:

 A) 20 cm B) 25 cm C) 35 cm D) 50 cm

Answer:   B) 25 cm

Explanation:

Total volume of water displaced =(4 x 50) cu.m = 200 cu.m

Rise in water level = $20040×20$=0.25m = 25cm

Q:

 A) 3422 B) 3852 C) 2464 D) 3550

Answer & Explanation Answer: C) 2464

Explanation:
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3 4933
Q:

What is the measure of an interior angle of a regular polygon of 8 sides?

 A) 140 B) 144 C) 135 D) 150

Answer & Explanation Answer: C) 135

Explanation:
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0 1799
Q:

Find the volume (in cm3) of a right circular cone of diameter 7 cm and height 7 cm.

 A) 69.06 B) 16.43 C) 11.15 D) 89.83

Answer & Explanation Answer: D) 89.83

Explanation:
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0 3082
Q:

∆PQR is right angled at Q. If m∠P = 60 deg, then find the value of (secR + 1/2).

 A) (2√2+√3)/2 B) (√3+4)/2√3 C) √3+2 D) 5/6

Answer & Explanation Answer: B) (√3+4)/2√3

Explanation:
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0 1893
Q:

Find the volume (in cm3) of a hemisphere of diameter 7 cm.

 A) 77 B) 63 C) 89.83 D) 54.13

Answer & Explanation Answer: C) 89.83

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0 2076
Q:

In ΔPQR measure of angle Q is 90 deg. If tanP = 24/7, and PQ = 14cm, then what is the length (in cm) of side QR?

 A) 50 B) 20 C) 26 D) 48

Answer & Explanation Answer: D) 48

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1 208
Q:

Find the surface area (in sq.cm) of a sphere of diameter 14 cm.

 A) 616 B) 4699 C) 8628 D) 6922

Answer & Explanation Answer: A) 616

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2 2949
Q:

If the edge of a cube is increased by 3 cm, the volume will increase by 657 cub.cm. What then is the original length of each edge of the cube?

 A) 9 cm B) 6 cm C) 8 cm D) 7 cm

Answer & Explanation Answer: B) 6 cm

Explanation:
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2 373