Question

how many cubic metres of earth must be dug to construct a 20 m deep well of diameter 7 n?if the earth taken out is spread over a rectangular plot of size 22m*14m,find the height of the plattform so formed​

Answer 1

Answer:

Step-by-step explanation:

We first get the volume of the soil dug out by getting the volume of the hole dug.

Volume=3.142×3.5^2×20=769.79

769.79m3

The area of the field is=28×11=308m2

The soil level =769.79/308=2.499m

2.499m