# Need math help with A hall that is 15 m long and 12 m broad

**Question description**

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

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

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/cm^{3}, then the weight of the pipe

A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man is

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 m^{3}, then the rise in the water level in the tank will be

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