Question

a well of diameter 3m is dug 14m deep. the earth taken out of it has been spread evenly all around it in the shape of a circular ring of width 4m to form an embankment .find the height of the embankment ​

Answer 1

Answer:

Solution:-

Height of the well = 14 m

Diameter of the well = 3 m

So, Radius of the well = 3/2 m

Volume of the earth taken out of the well = πr²h

= 22/7*(3/2)²*14

= 99 cu m

Outer radius of the embankment = R = (3/2 + 4)m = 11/2 m

Area of embankment = outer area - inner area

⇒ = πR² - πr²

= 22/7*[(11/2)² - (3/2)²]

= 22/7*[(121/4) - (9/4)]

= 22/7 × 112/4

= 88 m²

Height of the embankment = Volume/Area

= 99/88

Height of the embankment = 1.125 m

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Answer 2

Answer:

step by step explanation

Step-by-step explanation:

diameter of the well =3m

height of the well = 14m

width of the embankment = 4m

height of the embankment =?

hope this may help you