Question

Jagadish can build a wall in 10 days. Narender can build the same wall in 12 days while sumit takes 15 days to do the same job. Which two of them should be employed to finish the job in 6 days?

Answer 1

Answer-Jagadish and Sumit

ATQ,

Jagadish does 1/10th of the work in a day

Narendra does 1/12th of the work in a day

Sumit does 1/15th of the work in a day

Now,Divide 1 by the sum of the work done by any two of them in a day.The combination in which after adding and converting it into the lowest term,the denominator comes 6(the number of days taken) is the answer