Homework Help: Math

Posted by Peggy on Friday, November 30, 2012 at 3:28pm.

Mechanics are reboring a 6in deep cylinder to fit a new piston. The machine they are using increases the cylinders radius one-thousandths of an inch every 3 min. How rapidly is the cylinder volume increasing when the bore is 3.800 in.?

Math - Steve, Friday, November 30, 2012 at 4:10pm
v = pi r^2 h
dv/dt = pi(2rh dr/dt + r^2 dh/dt)
now plug in your values to get dv/dt

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