Wipro Company Numerical Ability Time and Work

A can do a piece of work n 7 days of 9 hours each and B alone can do it in 6 days of 7 hours each. How long will they take to do it working together 8 2/5 hours a day?

Read Solution (Total 2)

A can complete the work in (7*9)=63hours.
B can complete the work in (6*7)=42 days.
A's 1 hours work=1/63 and B's 1 hours work=1/42.
(A+B)'s 1 hours work=(1/63+1/42)=5/126.
Both will finish the work in (126/5)hours.
Number of days of 8 2/5 hours each=(126/5*5/42)=3days.
11 years agoHelpfull: Yes(6) No(2)

3 days..
11 years agoHelpfull: Yes(2) No(1)

Wipro Other Question

A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job? X can do ¼ of a work in 10 days, Y can do 40% of work in 40 days and Z can do 1/3 of work in 13 days. Who will complete the work first?