Multiple choice

4 boys and 8 girls can finish a job in 20 hours, while 8 boys and 10 girls can finish the same job in 12 hours. The pay-out is given to them according to their outputs. If a boy gets Rs. 160 per hour, then what is the ratio of the per hour pay-outs of a boy to that of a girl?

  1. 1 : 1

  2. 5 : 4

  3. 5 : 3

  4. 5 : 2

  5. 5 : 1
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let B and G be the hourly pay of a boy and a girl. 20(4B + 8G) = 12(8B + 10G). 80B + 160G = 96B + 120G. 40G = 16B. B/G = 40/16 = 5/2.

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