The diameter of a long playing vinyl record is 12 inches. The unused center has a diameter of 4 inches, and there is a smooth outer edge that is 1 inch wide. If there are 91 grooves to the inch, how far does the needle travel within the groove during playback of the record?

(In reply to Solution by e.g.)

ok
1.in the damn groove, not the whole record

2.in the groove it moves 7 in. in towards the middle, this is the stupidist solution i have ever seen

 

Posted by asdfjfaadslkfj on 2005-03-30 23:27:58