Question

If a and b, working together can finish a piece of work in 5 days, b and c in 3 days, c and a in 6 days. How much time will they take to complete the work, if a, b and c work together? A) 7 days b) 6 days c) 7 days

Answer 1

Let work done by a and b ,a+b=5days
work done by c and b ,b+c=3days
work done by a and c ,a+c= 6days
So we get 2(a+b+c)=14 All of dem can do work is given by a+b+c=7days
A)7days