if A can do the work in 5 days and B can do the work in 8 days . how much long time it would take to do the work together?
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40 days
Step-by-step explanation:
step-by-step explanation
Answered by
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Step-by-step explanation:
In 1- day A can do= 2/5÷8= 1/20 work
In 1-day B can do=3/5÷18= 1/30 work
In 1-day both can do =1/20+1/30 =5/60 = 1/12 work.
So complete can be done by both A and B in = 12- days.
3/4 of the work can be done by A and B in =3/4 x 12= 9- days.
it remembered me of 10th
even tried 100 times I was not able to answer this simple question but in final exam I cracked it
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