Question

At their annual car wash, the science club washes 30 cars in 45 minutes. At this rate, how many cars will they wash in 1 hour

Answer 1

Explanation:

30 cars45 minutes=10 cars15 minutes (simplified).

Now, since there's 60 minutes in an hour, multiply 15 by 4, and do the same thing to the other side. That's 40 cars in 60 minutes, or 40 cars/hour

Answer 2

car washed in one minute = 30/45
=2/3
car washed in one hour(60minutes)=2/3×60=40
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