Ram can copy 60 pages in 15 hours. If Ram and Riya together

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Ram can copy 60 pages in 15 hours. If Ram and Riya together can copy 180 pages in 30 hours, then in how many hours can Riya copy 20 pages?

[SSC CGL 24 July 2023 Shift 3 With Answers]

A

12 hours

B

20 hours

C

29 hours

D

10 hours

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