Question

a 21 meter deep well with diameter 6m is dug out and the earth is converted into a platform of 27x11 m. Find height of platform. plzzz help me mam dint expln love u mia khalifa

Answer 1

Answer:

If 21m deep well with diametre 6m (radius 3m) is dug and the earth from digging is evenly spread to form a platform 27m x 11m.

This means that the volume of mud digged is equal to the volume of mud used to build the platform (in cuboid shape)

 

Volume of cylinder = volume of cuboid platform

π r2 h = l x b x h

(22/7) x (3)2 x 21 =27 x 11 x h

h = 2 m

 

Therefore, the height of platform is 2m.

Answer 2

Answer:

height= 2m

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