SOLUTION: one machine can complete a job in 10minutes. if the same jobis done byh thismachine and an older machine working together, the job can be completed in 6 minutes. how long would it
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Question 394130: one machine can complete a job in 10minutes. if the same jobis done byh thismachine and an older machine working together, the job can be completed in 6 minutes. how long would it take the older machine to do the job alone?
You can put this solution on YOUR website! one machine can complete a job in 10minutes. if the same jobis done byh thismachine and an older machine working together, the job can be completed in 6 minutes. how long would it take the older machine to do the job alone?
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Machine A 6 minutes
1/6 of job in1 minute
..
Machine B + machine A = 6 minutes
they do 1/6 of the job in 1 minute
..
Job done by B in 1 minute =
1/6 -1/10
=(10-6)/60
=4/60
=1/15
...
so Machine B will take 15 minutes to do the same job
