A plumber laying five hundred meters of drain pipe requires twenty men working for ten days. What length in meters would be laid by fifty men in five days?

Answer: 625 meters

Step-by-step explanation: Five hundred meters of pipe would require twenty men working for ten days.

First, we have to find the rate of work for one man. This is calculated thus:

(500m) : (20men * 10 days) = 500 : 200 = (5/2) = 2.5 meters per day

From the rate of work of one man, we can then calculate the length in meters that fifty men can lay in five days. This is calculated thus:

50 men * (5/2) * 5 days = 50 * 2.5 * 5 = 625 meters.

Therefore, fifty men working together would lay six hundred and twenty five (625) meters of pipe in five days.