Question

A well of diameter 4cm is dug and the mud taken out is spread evenly around the well to form an
embankment 3 cm wide and 1 cm high.

Find the depth of the well.​

Answer 1

Answer:

hᎪᎽ mᎪᏆᎬ

Ꭵ hᎾᏢᎬ ᎽᎾu ᎪᏒᎬ fᎥᏁᎬ!

Step-by-step explanation:

Answer

Given, Diameter =4 m

Radius =2 m h=21 m

V=πr

2

h=π(2)(2)(21)=84π

Volume of soil dug from well = volume of earth used to form embankment

⇒84π=π(5

2

−2

2

)h

h=

25−4

84

=

21

84

=4m

Answer 2

Answer:

Answer is 4m

Step-by-step explanation:

Given, Diameter =4 m

Radius =2 m h=21 m

V=πr

2

h=π(2)(2)(21)=84π

Volume of soil dug from well = volume of earth used to form embankment

⇒84π=π(5

2

−2

2

)h

h=

25−4

84

=

21

84

=4m