Question

Answer: option d 8. 5 men and 12 boys finish a piece of work in 4 days, 7 men and 6 boys do it in 5 days. The ratio between the efficiencies of a man and boy is?

Answer 1

Step-by-step explanation:

4(5m+12b)=5(7m+6b)

20m+48b=35m+30b

48b-30b=35m-20m

18b=15m

6b=5m

m/b=6/5