self Maths Puzzle Programming Arrays


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 m3, then the rise in the water level in the tank will be:

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

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self Other Question

5.
A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8 g/cm3, then the weight of the pipe is:

A. 3.6 kg B. 3.696 kg
C. 36 kg D. 36.9 kg

The slant height of a right circular cone is 10 m and its height is 8 m. Find the area of its curved surface.

A. 30 m2 B. 40 m2
C. 60 m2 D. 80 m2