Question

a and b together can do a piece of work in 20 days whereas b and c together can do same work in 15 days if a,b and c together can finish this work in 10 days then find the number of days in which b alone can finish the work​

Answer 1

Answer:

a+b=20days

b+c= 15days

a+ b +c=10days

then L.C.M 20,15,10=60days

a+b=3 a+ b +c=6

b+c=4

a=2, b=1 c=3

B = 60/1=60days