A well is dug 20 m deep and it has a diameter 7 m. The earth which is so dug out is
spread evenly on a rectangular plot 22 m long and 14 m broad. What is the height of the
platform formed?
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Answer:
2.5m
Step-by-step explanation:
radius = 3.5 m
volume of the well
= height * 22/7 * r * r
= 20 * 22/7 * 3.5 *3.5
= 20* 22/2 * 3.5
= 20 *11 *3.5
=770 cubic meter
volume of platform =height * length * breadth
770=h*22*14
h=770/308
h=2.5m
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