Question

a well of diameter 6cm is dug 21m deep. the earth taken out of it has been spread evenly all around it in the shape of a circular ring of width 9 m to form an embankment .find the height of embankment​

Answer 1

Answer:

h=9.33cm

Step-by-step explanation:

1. volume of well=pie/4×(diameter)^2×height
2. =pie/4×6^2×21
3. =593.73cm^3
4. diameter of circle =9cm
5. volume of embankment =pie/4×(diameter)^2×height
6. 593.73=pie/4×9^2×height
7. height = 9.33cm