SOLUTION: solve this proportion: a rainstorm produced a rainfall of 2 inches per hour. How many hours would it take to get a rainfall amount of one foot.

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Question 542435: solve this proportion: a rainstorm produced a rainfall of 2 inches per hour. How many hours would it take to get a rainfall amount of one foot.
Answer by neatmath(302) About Me  (Show Source):
You can put this solution on YOUR website!

Given:

2 inches per hour

Want:

1 foot per x hours

Let's change the foot into inches to make it easier. Then we want

12 inches per x hours

From this it is fairly straightforward to see that it would need to rain for 6 hours to accumulate 12 inches of rain.

But we can also set it up as a proportion. In other words:

2 inches is to 1 hour as 12 inches is to x hours?

2%2F1=12%2Fx

Then we just need to cross multiply and solve for x:

2%2Ax=1%2A12

2x=12

x=6

So again, it would take 6 hours to have one foot (or 12 inches) of rainfall.

I hope this helps!