O, T and P can do a piece of work in 3, 4 and 6 hours respec

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O, T and P can do a piece of work in 3, 4 and 6 hours respectively. If they are working together, then in how much time they will finish the work?

[SSC CHSL 15th March 2023 Shift-3 With Answers]

A

1 hour 15 minutes

B

1 hour 10 minutes

C

1 hour

D

1 hour 20 minutes

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