Question
Quantitative Ability and Data Interpretation Question on Time and Work
A and B together can complete a task in 20 days. B and C together can complete the same task in 30 days. A and C together can complete the same task in 40 days. What is the respective ratio of the number of days taken by A when completing the same task alone to the number of days taken by C when completing the same task alone ?
A
2 : 5
B
2 : 7
C
3 : 7
D
1 : 5
Answer
1 : 5
Explanation
Solution
The correct option is (D) : 1 : 5.