Mathematics
Medium
Question
A can do piece of work in 30 days while B can do it in 40 days. In how many days can A and B working together do it ?
A
70 days
B
120/7 days
✓ Official correct answer
C
50 days
D
45 days
Community credibility
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A
70 days
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B
120/7 days
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C
50 days
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D
45 days
No member explanations yet for this option.