Question

Four employees can wash 20 service vehicles in 5 hours. How long would it take 5 employees to wash the same number of vehicles?

Answer 1

ANSWER: 4 hours.
As the number of employees who do the same work increase, the number of hours to finish is shorter

Answer 2

Explanation:

4 workers × 5 hours = 20 worker-hours

Each vehicle requires 1 worker-hour

For five workers it will take four hours