SOLUTION: This word problem is under a section of my homework called slove the equation. The word problem is: A town's old street sweeper can clean the streets in 60 hours. The new stree

Question 454796: This word problem is under a section of my homework called slove the equation.

The word problem is: A town's old street sweeper can clean the streets in 60 hours. The new street sweeper can clean the streets in 20 hours. How long would it take the old sweeper and the new sweeper to clean the streets together?

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A town's old street sweeper can clean the streets in 60 hours.
The new street sweeper can clean the streets in 20 hours.
How long would it take the old sweeper and the new sweeper to clean the streets together?
:
Let t = time required when sweeping together, (assume each had his own broom)
:
Let completed job = 1 (All the streets swept)
:
+ = 1
multiply by 60, to clear the denominators
t + 3t = 60
t =
t = 15 hrs sweeping together
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