Question

90 men can dig a well in 20 days after they have worked for 5 days .how many more men should be employed so as to complete the work in another 10 days

Answer 1

$\huge\bold{Answer}$

The total work that is being done by 90 men in 20 days

$= 90\times 20$

$=1800$

Work done in 5 days by 90 men

$= 90\times 5$

$= 450$

Work that's pending

$= 1800-450$

$= 1350$

1350 work should be done in 10 days,

so,let the number of men required be x

$(90+x)\times 10 = 1350$

$(90+x)=135$

$x = 135 - 90$

$x=45$

Therefore 45 more men should be hired.

Answer 2

Step-by-step explanation:

The total work that is being done by 90 men in 20 days

= 90\times 20=90×20

=1800=1800

Work done in 5 days by 90 men

= 90\times 5=90×5

= 450=450

Work that's pending

= 1800-450=1800−450

= 1350=1350

1350 work should be done in 10 days,

so,let the number of men required be x

(90+x)\times 10 = 1350(90+x)×10=1350

(90+x)=135(90+x)=135

x = 135 - 90x=135−90

x=45x=45

Therefore 45 more men should be hired.