SOLUTION: An old-model machine can stamp 1000 parts in 4 hours, but his helper would require 6 hours to do it alone. How long will it take them to do it if they work together.

SOLUTION: An old-model machine can stamp 1000 parts in 4 hours, but his helper would require 6 hours to do it alone. How long will it take them to do it if they work together.

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Question 75816: An old-model machine can stamp 1000 parts in 4 hours, but his helper would require 6 hours to do it alone. How long will it take them to do it if they work together.
Answer by checkley75(3666) (Show Source): You can put this solution on YOUR website!
4*6/(4+6)=24/10=2.4 hours to complete the 1000 parts when they work together.
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