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Surface Areas And Volumes

Question 3:

A 20 m deep well with diameter 7 m is 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:

The shape of the well will be cylindrical.

Depth (h) of well = 20 m

Radius (r) of circular end of well =

Area of platfor…

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