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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Vineet Patawari

Hi, I'm Vineet Patawari. I fell in love with numbers after being scared of them for quite some time. Now, I'm here to make you feel comfortable with numbers and help you get rid of Math Phobia!

4 thoughts to “Playing a Record”

      1. My answer is 9cm. Would request you to please let me know what is the correct answer.

        Prabhat Kumar

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