Question

a well 14 metre inside diameter is dug 15 metre deep earth taken out is spread all around to 2a with of 72 form and embankment find the height of of embankment​

Answer 1

Step-by-step explanation:

ANSWER

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.

Answer 2

Answer:

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