It takes 4 1/2 minutes for Elton John to listen to his favorite song on a record recorded at 45 r.p.m. (revolutions per minute). One day, Elton accidentally played this record at 33 1/3 r.p.m.'s. What was the number of revolutions required to play the song? What was the amount of time it took to play it at 33 1/3 r.p.m.?

Question

dumbcow · Answer

revolutions = rate*time
total revolutions = 4.5*45 = 202.5
time = revolutions/rate
time = 202.5/33.33 = 6.075 min

anonymous · Answer

the total number of revolutions at 45 rpm 
= 45 * 9/2 = 202.5 revolutions.

the number of revolutions will still be the same 33 1/3 rpms the time required would be 
202.5*3/100 = 6.075 min.