Question

A 20 m deep well with diameter 7 mis dug and the earth from digging is evenly spread out
to form a platform 22 m by 14 m. Find the height of the platform.​

Answer 1

Step-by-step explanation:

Here h denotes the height of the platform.

And the height of the platform is 2.5 m.

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Answer 2

Answer:

Volume of cylinder :- π(r^2)(h)

= 22/7×(7/2^2)×20 m^3

= 770 m^3

Let the height raised by 22 m × 14 m platform be equal to h metres

Therefore,

Volume of the earth in platform = Volume of the earth taken out of the well

22 × 14 × h = 770

h = 770/22 × 14 m

h = 5/2 m

h = 2.5 m

the height of the platform is 2.5 m

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