Question

Earth is dug out to a depth of 15 m from a circular plot of land of radius 7 m. The earth is then spread out evenly on an adjacent rectangular plot of dimensions 16 m × 7 m. Find the height of the earth on the rectangular plot.​

Answer 1

Answer:

well of diameter 7 m and depth 14 m is dug and the earth removed is spread evenly as a platform on a rectangular plot of land 28 m long and 21 m wide. Find the height of the platform.

ANSWER

By volume conversation ⇒

πr

2

h=lbh

1

7

22

×

2

7

×

2

7

×14=28×21×h

1

h

1

=

7

22

×

2

7

×

2

7

×14×28×21

=

2

11

m