Question

6. A and B working together can complete a job in 3 hours, if A alone can do the job in 7 1/2 hours, in
how much time can B alone finish the job?​

Answer 1

Step-by-step explanation:

Let us assume the job to be consisted of 15- units of work.

A- can complete 15/7.5= 2- units of work in 1- day

Both A+B can complete 15/3= 5- units of work in 1- day.

So B- alone can complete= (5–2)= 3- units of work in 1- day.

So B- can complete the whole job alone in = 15/3= 5- days.

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