Question

8. A well with 20m diameter is dug 28m deep. Earth taken out of it spread all around to a width of 10m to form an embankment. Find the height of embankment.

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Answer 1

Answer:

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Step-by-step explanation:

The height of the embankment is 10.14 m.

Step-by-step explanation:

Given : A well with 20m inside diameter is dug 7m deep. Earth taken out of it is spread all around to a width of 3m to form an embankment.

To find : The height of the embankment?

Solution :

A well with 20m inside diameter is dug 7m deep

Radius of the well = 10 m

Volume of the well is

Now, it is spread to form embankment, which is in the form of hollow cylinder,

Inner radius, r= 10 m

Outer radius = 10 +3 = 13 m

height= h

Volume of the earth spread=volume of the well

Therefore, The height of the embankment is 10.14 m.