SOLUTION: Rachael can solve 12 math problems in 50 minutes. At that same rate, how many problems would she be able to solve in 20 minutes?

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Question 873611: Rachael can solve 12 math problems in 50 minutes. At that same rate,
how many problems would she be able to solve in 20 minutes?
Found 2 solutions by ben720, richwmiller:
Answer by ben720(159) About Me  (Show Source):
You can put this solution on YOUR website!
Rate = 12/50 = 6/25
D=RT
D=12%2F50%2A20
D=360%2F50
D=7.2

She would be able to solve 7.2, or about 7, problems.

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
12/50=x/20
50x=240
5x=24
x=24/5=4.8
check reasonableness
20 is less than half of 50 so x must be less than half of 12
12/50=6/25
so it must be less than 6 since it takes her 25 minutes to do 6