Question

18. A well of inner diameter 14 m is dug to a depth of 12 m. Earth taken out of it has been evenly
spread all around it to a width of 7 m to form an embankment. Find the height of the
embankment so formed.
volume of earth taken out
Hint. Required height =
Tex [(14)2 – (7)?]​

Answer 1

Answer:

Let height of embankment be′h′meter. Then

Volume of embankment = Volume of earth taken out from the well

⇒π(R×R − r×r)h= πr×rH

⇒((7+7)×(7+7)−7×7)×h=7×7×12

⇒(196−49)×h=49×12

⇒h= 147 / 49×12 =4m

∴ Height of embankment =4m.

Step-by-step explanation:

I hope this will help you