A is a twice as excellent a worker as B, thus he can complete a project in 60 days less than B. They can achieve it in the following ways if they work together:
A. 20 days
B. 22 1/2days
C. 25 days
D. 30 days
Answer:B
A is a twice as excellent a worker as B, thus he can complete a project in 60 days less than B. They can achieve it in the following ways if they work together:
A. 20 days B. 22 1/2days C. 25 days D. 30 days
Explanation: The ratio of time spent by A and B is 1:3.The difference in time is (3 - 1) 2 days, with B taking 3 days and A taking 1.If the time difference is two days, B will take three days.B takes 3/2 x 60 = 90 days if the time difference is 60 days.As a result, A takes 30 days to complete the task.1 day's work for A = 1/30=1 day's work for B = 1/90=1 day's labour for (A + B) =1/30+1/90= 4/90=2/45.A and B can complete the task in 45/2 = 22 1/2 days if they work together.