Mathematics
Medium
Question
P and Q can complete a work in 20 days and 12 days respectively. P alone started the work and Q joined him after 4 days till the completion of the work. How long did the work last?
A
5 days
B
10 days
✓ Official correct answer
C
15 days
D
12 days
Community credibility
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A
5 days
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B
10 days
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C
15 days
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D
12 days
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