police UP Police Jail Warder Mock Test Quantitative Aptitude Time and Work Work Efficiency

A, B and C can do a piece of work in 60, 30 and 20 days respectively. A, B and C started working together and worked for 7 days. In how many days A alone will complete the remaining work?

1

15 days

2

20 days

3

18 days

4

10 days

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