How many cubic meters of earth must be d...

How many cubic meters of earth must be dug out to sinc a well 20m deep and has a diameter of 7m ? If the earth so dug out spread over a rectangular plot of 25m by 11m, What is height of the platform so formed ?

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The correct Answer is:

`770 m^(3), 2.5 m`

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RS AGGARWAL-VOLUME AND SURFACE AREA OF SOLIDS-EXERCISE 20 B

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