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 num
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 num
A). 2 : 5
B). 2 : 7
C). 3 : 7
D). 1 : 5
1 answers
Other Questions
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