Question

if 2 mens or 3 boys do a piece of work in 40 hours how long it will take for 4 mens and 9 boys to do the same piece of work​

Answer 1

Answer:

2 men = 3 boys

1 men = 3/2 boys

so 4 men = 3/2 × 4 boys = 6 boys

now the problem is

3 boys can do a work in 40 hours

what time will 4 men and 9 boys take to complete the work

it means that 4 men = 6 boys

so 4 men and 9 boys = 6 boys + 9 boys = 15 boys

so the solution is,

3 boys = 40 hours

1 boy = 40 × 3 = 120 hours

15 boys = 120/15 hours = 8 hours.

Answer 2

Step-by-step explanation:

2men=3boys

1men=3/2 boys

so4 man= 3 / 2× 4 boys= 6 boys

now the problem is 3 boy can do a work in 40 hours.so what time will 4 men and 9 boys take to complete the work

it means that 4 men=6boys

so 4 men and 9 boys= 6 boy + 9 boy =15 boy

so solution is

3boys= 40 hours

1boy=40×3= 120 hours

15 boy= 120 / 15 hour= 8 hours