Question

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 efficiencties of man and boys is?

Answer 1

GIVEN,
RATIOS=5:12:4,7:6:5
EFFICIENCY OF MEN=12 MEN
EFFICIENCY OF BOYS=18 BOYS
RATIO OF WPEFFICIENCIES=12:18=6:9=2:3