Question

4. A well of diameter 14 m is dug 15 m deep. The earth taken out of it has been spread
evenly to form circular embankment all around the well of width 7m. Find the height of the
embankment.​

Answer 1

Answer:

Let the height of embankment be 'h' m. Radius of earth or soil taken out = 7 m. Height of soil taken out = 15 m. Then, radius of well with embankment = 7 + 7 = 14 m

Answer 2

Step-by-step explanation:

r=7m

h=15m

Volume of mud =πr

2

h

=

7

22

×7×7×15

=2310m

3

Area of ring =π[14

2

−7

2

]

⇒π(14+7)(14−7)

⇒14+π

Height =

Areaofring

volumeofmud

=

147π

2310

=5m.