Question

a well is dug 20m deep and it has a diameter 7m. the earth which is so dug out is spread evenly on a rectangular plot 22m long and 14m broad. what is the height of platform formed?

Answer 1

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Answer 2

Answer: 2.5m

Step-by-step explanation:

Lets 1st find the volume of the mud dug out. Formula used will be r²h.

Hence we have volume = 22/7 × (7/2)² × 20

We also have the volume of the cuboid at L x B x H

Here L = 22 and B = 14, we need to find H

Since the two volumes are equal, we have

22 x 14 x H = 22/7 × (7/2)² × 20

Hence we get the Height of the platform as 2.5m