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Question

M, N and O can complete a task in ‘t’, 100, and ‘t + 20’ days respectively. All three started together, but after 15 days, N dropped out. Then, 30 days before the work finished, M also left. The work was finished in 60 days. Find the value of ‘t’.

A 13

B 25

C 20

D 10

E None of these

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