Boat and Ambulance Problem

Hi.

So this problem-

http://www.rtmsd.org/74417169134649/..._SOLUTIONS.pdf

I was looking at this problem as a homework assignment, and I don't understand what the purpose of is... and how it becomes 0.

Please help me out!

Thanks.

Quote:

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Originally Posted by ns2583

Hi.

So this problem-

http://www.rtmsd.org/74417169134649/..._SOLUTIONS.pdf

I was looking at this problem as a homework assignment, and I don't understand what the purpose of is... and how it becomes 0.

Please help me out!

Thanks.

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Its T', which means its the derivative, in the answer they solve that for zero. So what they do is

1.Derive the T formula
2.Set it equal to zero
3.Solve X