Asked by Kevin
An automobile is traveling at 65 mph. If each tire has a radius of 15 inches, at which rate are the tires spinning in revolutions per minute (rpm)? (63360in=1 mile)
Answers
Answered by
Kevin
i did
65 miles=1 hour
63360 in=1 mile
1 hour= 60 minutes
1 rev=30 pi
in the end after multiplying i got 728.3 rpm, is this correct?
65 miles=1 hour
63360 in=1 mile
1 hour= 60 minutes
1 rev=30 pi
in the end after multiplying i got 728.3 rpm, is this correct?
Answered by
Reiny
One rotation = 30π inches, you had that
65 miles per hour
= 65(63360) inches per 60 minutes
= 68640 inches/min
number of rotations = 68640/(30π)
= 728.3 rotations
correct!!!
65 miles per hour
= 65(63360) inches per 60 minutes
= 68640 inches/min
number of rotations = 68640/(30π)
= 728.3 rotations
correct!!!
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