If a pump set with a pipe of 14 cm diameter can drain 2500-meter water per minute. Let us write by calculating, how much kilometer water will that pump drain per hour [1 liter = 1 cubic dcm].
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Q- It is required to make a plastering of sand and cement with 3.5 cm thick, surrounding four cylindrical pillars, each of whose diameter is 17.5cm. (i) If each pillar is of 3 meter height, let us write by calculating how many cubic dcm of plaster materials will be needed. (ii) If the ratio of sand and cement in the plaster material be 4:1, let us write how many cubic dcm of cement will be needed.
Chapter: Right Circular Cylinder