1.

If 4 men or 6 boys can finish a work in 20 days. How long will 6 men and 11 boys take to finish the same work?

Answer»

6 DAYS



4 MEN = 6 BOYS 

Then, 1 BOY = 4/6 men = 2/3 men 

11 boys = 2/3 × 11 men = 22/3 men 

Then, 6 men + 11 boys = 6 + 22/3 men = 40/3 men 

1 work done = 4 men × 20days 

That is, 4 × 20 = 40/3 × ? days

? days = 4 × 20 × 3/40 = 6 days



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