Question

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

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