Question

plz answer me back fast

Answer 1

in 9months by 420
in 7 months by
$420 \times 7 \div 9$

Answer 2

Answer:

120 men

Step-by-step explanation:

Let the work to be done be 'x'.

Given that Time taken by 420 men to complete x = 9 months.

x = 420 * 9 = 3780.

Number of men required to complete the work in 7 months:

= 3780/7

= 540.

∴ Number of extra men had to employ:

= 540 - 420

= 120.

Therefore, contractor had to employ 120 employees.

Hope it helps!