Question

If 5 man and 4 boy finish a work in 10 day and 2man and 2 boy complete it into 23 day than 10 man and 5 boy complete it into how many day

Answer 1

Answer:

Step-by-step explanation:

Let no.of men be x and no.of boys be y

5x+4y=10

2x+2y=23

Multiply 2x+2y=23 with 2

4x+4y=46

By elimination method

5x+4y=10-

4x+4y=46

=>x=-36

2*-36+2y=23

2y=23+72

y=47.5

10x+5y=10*-36+5*47.5

=-360+237.5

=|-62.5|=62.5days