Posted by **Chris** on Tuesday, October 15, 2013 at 6:58pm.

If Jack takes 6 hours to wash 4 cars then at that rate how man cars could be washed in 42 hours?

we got answer of 28 cars but then how do you determine the rate the cars were being washed?

the teacher gave answer of 2/3 cars per hour but we don't understand how she got that.

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