Question

18. Men can complete a piece of work in 12 days. How
many additional men will be required to complete
double the work in 8 days?
(b) 21 774 (d) 7
(a) 28​

Answer 1

Answer:

7 men × 12 days

_____________

1 work

(7+n) men 8 days

_____________

2 works

Step-by-step explanation:

(n is additional no of men required)

21 =7+1

n=14 men

hope it helps you

Answer 2

Answer:

21 men

Step-by-step explanation:

We know

Work=men*hours*days

18 Men can complete a piece of work in 12 days.

1w=18m*12d                      ---------(1)

many additional men will be required to complete  double the work in 8 days

double the work is 2w

Let x=additional men

2w=(18+x)*8d                  ----------(2)

Eq(1) divided by Eq(2)

1w/2w=18m*12d/(18+x)*8d

by solving we get 21 men