Question

19 men work 9h/day to compleye 36 m long wall in 25 days. 20 men work 5h/day how long wall made in 38 days? ​

Answer 1

Answer:

Step-by-step explanation:

20 X 8 X 21 Equals 3360, which is the total number of Man-Hours necessary to complete the job in 21 days. Leaving the Question :

48 X 7 X n Equals 3360, or 3360 Divided by 336 Equals 10.

So, the answer is 10 hours per day. Why,?

Because simple multiplication tells us that 48 men working 7 days at 10 hours per day achieve the same output as 20 men working 21 days at 8 hours per day.

(48 X 7 X 10 Equals 20 X 21 X 8).