Question
Three boys and five girls together can finish a job in 3 days. Working on the same job 3 girls take 5 days more than the time required by 2 men. What is the ratio of efficiency of a boy to a girl?
Answer: Option B
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B
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B
3B+5G=33.33%..............(i)
Time taken by 3 women =1003G ; Time taken by 2 men =1002B
1003G−1002B=5 →33.33G−50B=5.................(ii)
Option (a): B=2G → 11G = 33.33% → G = 3.03 , B = 6.06. Substitute in (ii), 11 - (approx 8) = approx 3.
Option (b): B=2.5G → 12.5G = 33.33% → G = 83 , B=203, Substitute in (ii), 12.5 - 7.5 = 5 which is the difference given in the question.Hence option (b).
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