Posted by **Reonea** on Sunday, October 30, 2011 at 7:29pm.

A 18 ft ladder leans against a wall. The bottom of the ladder is 4 ft from the wall at time t=0 and slides away from the wall at a rate of 3ft/sec.

Find the velocity of the top of the ladder at time t=1.

The velocity of ladder at time t=1 is __________ ft/sec.

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