Arithmetic Ability
Time and Work

42 / 118

Q.

Concept of Efficiency A can do a job in 12 days and B can do the same job in 6 days, in how many days working together they can complete the job?

View Answer

Correct choice: C

Explanation:

A's 1 days work = 1/12 B's 1 days work =1/6 Therefore, (A+B)'s 1 day's work= 1/12 + 1/6 = 1/4 Therefore, Time taken by both to finish the whole work = 114/ = 4 days Alternatively : Efficiency of A =100/12 =8.33% Efficiency of B =100/6=16.66% Combined efficiency of A and B both = 8.33+16.66=25% Therefore, Time taken by both to finish the work (working together) =100/25= 4days
42 / 118