Mathematics
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Medium
Question
A is thrice as good a workman as B and takes 10 days less than B for a job. In how many days can B do the work?
A
15 days
✓ Official correct answer
B
14 days
C
16 days
D
30 days
Community credibility
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A
15 days
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B
14 days
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C
16 days
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D
30 days
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Explanation
If A takes x days, B takes 3x, and 3x − x = 10 ⇒ x = 5. B takes 15 days.