Volume and Surface Area Questions And Answers.

1.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 ∏ cm3
B. 15 ∏ cm3
C. 16 ∏ cm3
D. 20 ∏ cm3

2.In a shower, 5 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is?
A. 75 cu. m
B. 750 cu. m
C. 7500 cu. m
D. 75000 cu. m

3.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. 720
B. 900
C. 1200
D. 1800

4.66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be?
A. 84
B. 90
C. 168
D. 336

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

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