Subject
Quantitative Aptitude
Topic
Time and Work
5 men and 2 boys together in 1 hour do 4 times work as 1 man and 1 boy do in an hour. Determine the ratio of the efficiency of a man and a boy.
5 men and 2 boys together in 1 hour do 4 times work as 1 man and 1 boy do in an hour. Determine the ratio of the efficiency of a man and a boy.
ক)
4 : 1খ)
1 : 4গ)
3 : 4ঘ)
2 : 1ঙ)
1 : 2Explanation
Let Work done by 1 man in 1 hour be M units. Also, let the work done by 1 boy in 1 hour be B units ∴ Work done by 1 man and one boy in 1 hour = M + B ∴ Work done by 5 men and 2 boys in one hour = 5M + 2B Now, as per the given information, 5M + 2B = 4 × (M + B) 5M + 2B = 4M + 4B M = 2B M : B = 2 : 1 ∴ratio of efficiency = M : B = 2 : 1Related questions
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