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❤A WELL OF DIAMETER 3m IS DUG 21m DEEP . THE EARTH TAKEN OUT OF IT IS SPREAD EVENLY ALL AROUND IT TO A WIDTH OF 4m TO FORM AN EMBANKMENT . FIND THE HEIGHT OF THE EMBANKMENT .❤
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➡Question :-
A well of diameter 3m is dug 21m deep.The earth taken out of its spread evenly all around it to a width of 4m to form an embankment.Find the height of the embankment.
➡Solution is in attachment✌
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Given,
Diameter =4 m
Radius =2 m
h=21 m
=>V=πr^2h
=> V=π(2)(2)(21)
=>V=84π
Volume of soil dug from well = volume of earth used to form embankment
=>84π=π(5^2−2^2)h
=>84=(25-4)h
=>84=21h
=>h=84/21
=>h=12/3
=>h=4m
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