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Mathematics
P can do a work in the same time in which Q and R together can do it. If P and Q work together, the work can be completed in 10 days. R alone needs 50 days to complete the same work. then Q alone can do it in__________?
A
30 days
Option A
25 days
Correct answer
C
20 days
Option C
D
15 days
Option D
Correct answer: B
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