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Question

'P', 'Q', and 'R' can complete a job in 60, 90, and 120 days respectively. They begin together, but 'P' leaves 10 days before the work is done and 'Q' leaves 5 days before completion. How long did the work take? (Calculate approximate value)

A 65 days

B 13 days

C 78 days

D 34 days

E None of these

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