A and B can complete a work separately in 10 days and 15 days, respectively. B alone work for 3 days and then he left the work. In how many days will A finish the remaining work?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option3 i.e. 8 days
Given that
A and B can complete a work separately in 10 days and 15 days.
According to the question
A × 10 = B ×15
A/B = 15/10 = 3/2
Efficiencies of A and B are 3 and 2
Total work = 3 × A = 3 × 10 = 30
B alone work for 3 days = 2 × 3 = 6 work complete
Hence, A will finish the remaining work = (30 - 6)/3 = 8 days