railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Time and Work Work Efficiency

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?

1
29 hours
2
12 hours
3
20 hours
4
10 hours
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