Question

Binny is 20% more efficient than Ankush, while Ankush is 50% more efficient than Raju. If the three of them—Ankush, Binny, and Raju—working together can finish a task in 45 days, how many days will Binny need to complete 72% of the same task on his own?

A 65.9 days
B 22.5 days
C 77.4 days
D 89.5 days
E None of these
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