SOLUTION: virginia can deliver papers on her paper route in 30 minutes. When her brother Wayne takes the route, it takes him 40 minutes. How long does it take if they deliver the papers to

Question 189276: virginia can deliver papers on her paper route in 30 minutes. When her brother Wayne takes the route, it takes him 40 minutes. How long does it take if they deliver the papers together?
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
.
Let x = time it takes to deliver together
x/30 + x/40 = 1
x(1/30 + 1/40) = 1
Multiplying both sides by 120:
x(4 + 3) = 120
x(7) = 120
x = 120/7
x = 17.143 minutes
or
17 minutes and 9 seconds

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