Question
'A' and 'B' can finish a task together in 30 days. They
worked together for 18 days and then left. The rest of the task was done by 'C' in 12 days. How many days will 'C' alone take to complete 75% of the total task?Solution
ATQ,
Fraction of work done by 'A' and 'B' = (18/30) = (3/5) Fraction of work done by 'C' = 1 - (3/5) = (2/5) So, number of days taken by 'C' to complete the entire work = 12 ÷ (2/5) = 30 days So, time taken by 'C' to complete 75% of the work = 30 × 0.75 = 22.5 days
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