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Ive been trying to solve the following problem:

There are two gear wheels whose centers are seperated by 25 cm.

a chain is wrapped around the two wheels such that if one wheel is turned the other turns(much like a cycle chain.) If th radius of the wheels are 11cm & 4 cm respectively, find the lenth of the chain.

I know the problem seems simple, and i have solved it. But I did it by estending the chains in the direction of the smaller wheel and ended up with a cone. Then I foundout the length of thechain,but I realise that the working was too long. Is there a simpler method to solve this . Is there a general method?

Plz help.

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# Chain pain

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