Question

a well with 10m inside diameter is dug 14m deep. Earth taken out of it is spread all around it to make an embankment of height 4 2/3 m. find the width of the embankment​

Answer 1

Answer:

9th

Maths

Surface Areas and Volumes

Surface Area of Right Circular Cylinders and Cones

A well with 10 m inside dia...

MATHS

A well with 10 m inside diameter is dug 14 m deep. Earth taken out of it is spread all around to a width of 5 m to form an embakment, the height of the embankment is ________.

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ANSWER

Well with 10m diameter is dug 14m deep.

⇒ Cylindrical radius =

2

10

=5m

Volume =πr

2

h

=

7

22

×5×5×14

=1100 cubic meter

Is taken out and spread width of 5m.

( diagram )

⇒R

1

=5+5=10m

r=5m

⇒V=π(R

2

−r

2

)h

1100=

7

22

(10

2

−5

2

)h

350=(100−25)h

h=

75

350

=

3

14

⇒h=4.66m

Hence, the answer is 4.66m.

solution

Answer 2

Answer:

a well wil 10m inside diameter is dug 14m deep.