Question

Madhuri, a government contacter,
has a work force of 560 Men
who can finish a certain piece
o work in 8 months. How many
extra men must he employ
I to complete the job in
7 months ?​

Answer 1

Extra 80 men will be employed to complete the work in 7 months.

Explanation :

Given that,

Men $M_{1} = 560$

Time  months $T_{1} = 8$ months

Work $W_{1} = 1$

Time $T_{2} = 7$ months

Men $M_{2} = 560 + x$

Extra men $x =$?

We know that,  

the formula $\frac{M_{1}\times T_{1}}{w_{1}} = \frac{M_{2}\times T_{2}}{w_{2}}$

$\frac{560\times 8}{1} = \frac{(560 +x)\times7}{1}$

$x = 640 - 560 = 80$

So extra 80 men will be employed to complete the work in 7 months.