Question
Aman finishes 2/5 of a task in 8 days, while Bhanu
completes the entire task in 16 days. How long will it take for both Aman and Bhanu, working together, to complete 90% of the task?Solution
ATQ; Time taken by ‘Aman’ to complete whole work alone = 8 × (5/2) = 20 days Let total work = 80 units Efficiency of ‘Aman’ = 80/20 = 4 units/day Efficiency of ‘Bhanu’ = 80/16 = 5 units/day Required time taken = {(0.9 × 80)/(5 + 4)} = 8 days
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