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1. A man and a boy together can complete a job in 81 days. Two man and three boys together can complete the job in 36 days. In how many can 4 men working together complete the job?
- A. 30
- B. 30
- C. 30
- D. 30
Answer: Option E
Explanation:
Man = M , Boy = B
1M + 1B = 1/81
81M + 81B = 1 work
2M + 3B = 1/36
72M + 108B = 1 work
81M + 81B = 72M + 81B
9M = 27B
1M = 3B
4M = 12B
12B = 4/12 x 81 Days
4M = 27 Days
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