Question

Please Help Me I have a very small question

In the answers where did the 15 come from?

Answer 1

I have posted the question and the answer the only thing I do not understand is where they got the 15 and multiplied it by 600?

Answer 2

What I did was find the speed per second = 600cm/s
and find the circumference = 200cm

then I divided 600/200 = 3 rotations per second thus 6 rotations for 2 seconds but I did not understand why 600cm/s was multiplied by 15?

Answer 3

any ideas?

Answer 4

The question says 2 seconds, answer key says 15 seconds, somewhere there's an error.

Answer 5

but they divide the 45/15 = 3 , 3 rotations per second

Answer 6

"600/200 = 3 rotations per second"

3 per second is 3 per second...

Answer 7

yea thats my point why was the 15 there

Answer 8

It's a mistake, in either the question or answer.

Answer 9

thanks