Aptitude - Volume and Surface Area

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"No one is as deaf as the man who will not listen."
- (Proverb)

A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of 3 cm to form a cone. The volume of the cone so formed is:

A. 12 cm3B. 15 cm3
C. 16 cm3D. 20 cm3


In a shower, 5 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is:

A. 75 cu. mB. 750 cu. m
C. 7500 cu. mD. 75000 cu. m


A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is:

A. 720B. 900
C. 1200D. 1800


66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be:

A. 84B. 90
C. 168D. 336


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 kgB. 3.696 kg
C. 36 kgD. 36.9 kg

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