Question

6. A well with 10m inside diameter is dug 8.4m deep. Earth
taken out of it is spread all around it to a width of 7.5m to
form an embankment. find the height of the embankment. 4
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Answer 1

Answer:

such a easy question cannot solve this from example

Answer 2

Step-by-step explanation:

diameter = 10m

radius = 5m

depth = 8.4m

thus,

volume =

$\pi \times {r}^{2} \times h$

thus

volume = 22/7 * 5 * 8.4 m^2

= 22 * 5 * 1.2 = (132m^2)

thus volume of embankment =

$\pi \times ( { r1}^{2} - {r2}^{2} ) \times h$

thus,

132 = (7.5)^2 * h

h = 132/56.25

h = 2.34 (approx..)

thanks

hope it helps