Question

if 3 men or 6 boys can finish a work in 20 days how long will 4 men and 12 boys take to finish the same work

Answer 1

Answer:

Step-by-step explanation:7.5 days

Answer 2

Answer:

6

Step-by-step explanation:

Assume mans work as x and boys work as y

3x = 6y = 20

So

x = 2y

so we can form the equation from the question

4x + 12y = 10x or 20y (since x = 2y. so we can form 4x+12y as 20y)

and when 3 men could do the work in 20 days we can form

3x = 20

10 = 3 ÷ 10 × 20

10x = 6 (since 10 x = 4x+20 y)