Playing a Record

A gramophone record has a diameter of 30.5 centimeters. The centre is unused and has a diameter of 10 centimeters. There is also a smooth outer edge 1.25 centimeters wide around the recording.

If the grooves are 36to the centimeter, how far does the needle move during the actual playing of the record?

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  1. VIJIT
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      • Prabhat Kumar

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