how many cubic metres of earth must be dug out to sink a well which is 20 m deep and has a a diameter of 7 metres. if the earth so dug out is spread over a rectangular plot 28 m by 11 m, what is the height of the platform so formed ?
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HII
What do you mean I don't understand
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Step-by-step explanation:
We first get the volume of the soil dug out by getting the volume of the hole dug.
Volume=3.142×3.5^2×20=769.79
769.79m3
The area of the field is=28×11=308m2
The soil level =769.79/308=2.499m
2.499m
ANSWERED BY GAUTHMATH
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