Posted by **jake** on Thursday, January 19, 2012 at 4:13pm.

If the diameter of a monster truck tire is 3.5 m and it makes one rotation every 5 seconds, how far does the tire

roll in 1 minute?

Diameter 3.5

radius: 3.5/2 = 1.75

12(2pi x 1.75)

=131.9 m

the book states that its 263.89 m?

What did I do wrong?

- Math -
**Steve**, Thursday, January 19, 2012 at 4:26pm
Looks good to me. Book must be in error.

- Math -
**Blake Eastwood**, Sunday, June 8, 2014 at 1:41am
the book is wrong you're right they didn't find the radius they used the diameter as their radius that is why your answer seem to differ from theirs but you're actually right.

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