Rates

[Nat2663]

(1 point) A potter forms a piece of clay into a cylinder. As he rolls it, the length, L, of the cylinder increases and the radius, r, decreases. If the length of the cylinder is increasing by 0.9 cm per second, find the rate at which the radius is changing when the radius is 3 cm and the length is 11 cm. (Give units.)
rate =

 

[Deleted member 4993]

(1 point) A potter forms a piece of clay into a cylinder. As he rolls it, the length, L, of the cylinder increases and the radius, r, decreases. If the length of the cylinder is increasing by 0.9 cm per second, find the rate at which the radius is changing when the radius is 3 cm and the length is 11 cm. (Give units.)
rate =

The fist assumption you have to make that (since no heat is involved) - the volume remains constant.

Please show us what you have tried and exactly where you are stuck.

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