SOLUTION: Lola and Betty work at a factory that makes rubber duckies. If it takes Lola 8 seconds to paint a ducky's bill red and Betty 10 seconds to do the same, how many seconds will it ta

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Question 1159053: Lola and Betty work at a factory that makes rubber duckies. If it takes Lola 8 seconds to paint a ducky's bill red and Betty 10 seconds to do the same, how many seconds will it take them together to paint 36 red bills?
Found 2 solutions by ikleyn, solver91311:
Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
.

In 40 seconds, Lola paints 40/8 = 5 rubber duckies.


In the same time, Betty paints  40/10 = 4 rubber duckies.


Thus in 40 seconds, they both paint 5+4 = 9 toys.


It means that they need 40 seconds * 36%2F9 = 40*4 = 160 seconds 

          to paint 36 toys working together.    ANSWER

Solved.


Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


L can do one in 8 seconds, so she can do of one in one second. Likewise, B can do of one in one second. Together, they can do:



of one in one second. So that means together they take seconds to do one.

They would finish 36 in seconds. You can finish the arithmetic.


John

My calculator said it, I believe it, that settles it