Question

QUESTION 4
+5 Marks
10 workers can complete a job in 20 days. After how many days should 5 workers leave so that
the job is completed in 25 days?​

Answer 1

Answer:

10 workers complete a job in 20 days..

if one person had to complete the job, it would take him 10*20 = 200 days...

Now for the task to be finished in 25 days... the total no of workers should be = 200/25 = 8

Answer 2

Answer:

15 days.

Step-by-step explanation:

Total Work = 10 * 20 = 200

let x be the number of days after 5 workers leave so we get,

( 25 - x ) * 5 + 10 * x = 200

125 - 5x + 10x = 200

5x = 200 - 125

x = 75 / 5 = 15

Hence, After 15 days the 5 workers leave.