LIC AAO Model Paper 3

Question : 44 of 160

Marks: +1, -0

A well with 14m Inside diameter Is dug 10m deep. Earth taken out of It, has been evenly spread all around It to a width of 21 m to form an embankment. The height (in metres) of the embankment Is :

1/2
1/3
3/4
3/5
None of these

Validate

Solution:

Volume of earth dug out =

({22}/7×7×7×10)

m^3

= 1540

m^3

Area of embankment =

{22}/7[(28)^2-(7)^2] m^2

{22}/7

× (28 + 7) (28 - 7)

m^2

{22}/7

× 35 × 21

m^2

∴ Height of embankment =

{\Volume}/{\Area}

{1540}/{2310}

m =

2/3

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