Question

10.
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 complete the
same task alone to the number of days taken by C when completing the same task
alone ?
1) 2:5
2) 2:7
3) 3:7
4) 1:5
5) 3:5​

Answer 1

Answer:

option c is correct answer

Answer 2

Answer:

e is correct

Step-by-step explanation:

A+B=20. C+B=30. A-C=-10. A+C=40. now A=15. and C=25