The volume V of a nght circular cylinder of radius r and height h is V= 7rh. (a) How is related to dr it h is constant and r vares with time? (Enter dr as dr/dt.) dt (b) How is वed to dh if r is constant and h varies with time? (Enter dh as dh/dt.) (c) How is related to dh and if both h and r vary with time?

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