Question

A 10m deep well with diameter 7m is dug and the earth from digging is evently spread out to form a platform 22m by 14m .find the height of the platform.​

Answer 1

Step-by-step explanation:

Diamter = 7 m

so, radius = 3.5 m

Earth dug out from (cylindrical) well

=π×r×r×h

=

7

22

×3.5×3.5×20

=770m

3

to from platform ...... (cuboidal)

volume of cuboid = l×b×h

770=22×14×h

so, height =

22

770×14= 2.5m

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