# [SOLVED]rate of change in cone

#### karush

##### Well-known member
View attachment 1556

if correct? wasn't sure if $$\pi$$ should be in answer since answer is in$$\frac{\text{in}^3}{min}$$

#### MarkFL

Looks perfect...since $\pi$ is a dimensionless constant, it does not affect your units. Personally, unless asked for a decimal approximation, I would leave the answers in terms of $\pi$.