Asked by simranpreet
A well of diameter 7cm is dug 22.5m deep.The earth taken out it is spread evently all around it to a width of 10.5 to from an embankment .find the height of the embankment.
Answers
Answered by
Steve
that's some skinny well!
v = pi r^2 h = pi(3.5)^2 (2250) = 86590 cm^3
If the embankment is 10.5 cm wide, starting at the edge of the well (complete description of the problem is important!)
86590 = pi (17.5^2 - 7^2)h
so, h = 107 cm
v = pi r^2 h = pi(3.5)^2 (2250) = 86590 cm^3
If the embankment is 10.5 cm wide, starting at the edge of the well (complete description of the problem is important!)
86590 = pi (17.5^2 - 7^2)h
so, h = 107 cm
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