Question

Amit and BK working together can finish a particular task in 90 days, while BK and Chiku working together can complete the same task in 70 days. Determine the number of days it would take for Amit to complete 80% of the task individually, given that Amit is 40% less efficient than Chiku.

A 145 days
B 125 days
C 170 days
D 168 days
E none of these
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