(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A wight W is attached to a rope 50 ft long that passes over a pulley at point P, 20 ft above the ground. The other end of the rope is attached to a truck at a point A, 2 ft above the round. If th truck moves away at the rate of 9 ft/s, how fast is the weight rising when it is 6 ft above the ground.

3. The attempt at a solution

I got the solution and it says:

y^{2}= (30 + x)^{2}- (18)^{2}

and I don't understand why it is not

y^{2}= (30+x)^{2}- (20-x)^{2}

since the rope is 50 ft long

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# Homework Help: Related Rates, formulating the problem

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