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## Q- If a gas cylinder for fuel purpose having the length of 7.5 dcm and the length of the inner diameter of 2.8 dcm carries 15.015 kg of gas, let us write by calculating the weight of the gas of per cubic dcm.

Chapter: Rectangular Parallelepiped or Cuboid

## Q- The daily requirement of water of three families in our three-storyed flat are 1200 lit, 1050 lit. and 950 lit respectively. After fulfilling these requirements in order to put up a tank again and to deposit to store 25% of the required water, only a land having the length of 2.5 m and breadth of 1.6 m has been procured. Let us calculate the depth of the tank in metre that should be made. If the breadth of the land would be more by 4 dcm, then let us calculate the depth of the tank to be made.

Chapter: Rectangular Parallelepiped or Cuboid

## Q- The depth of a cuboidal pond with length of 20 m and breadth of 18.5 m is 3.2 m. let us write by calculating, the time required to irrigate whole water of the pond with a pump having the capacity of irrigate 160 kilos lit. water per hour. If that quantity of water is poured on a paddy field with a ridge having the length of 59.2 m and breadth of 40 m. then what is the depth of water in that land- let us write by calculating it, [ 1 cubic metre = 1 kilo litre ]

Chapter: Rectangular Parallelepiped or Cuboid