6 men or 10 boys can do a piece of work in 15 days if 7 men and x boys can do work on 9 what is x
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Answer:
5 boys
Step-by-step explanation:
mandays =>
mens= 6×15= 90days
boys= 10×15= 150days
therefore,
(7/90+ x/150)9= 1
7/10+ 3x/50 = 1
35+3x/50= 1
35 + 3x =50
3x= 50-35
3x=15
x=5 boys
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