Twelve water pumps can empty a water tank in 20 minutes. If 2 pumps are out of order, how long will the remaining pumps take to empty the tank?
Q1. Twelve water pumps can empty a water tank in 20 minutes. If 2 pumps are out of order, how long will the remaining pumps take to empty the tank?
Answer: 24 minutes
Explanation: The correct value is 24 minutes. Apply the formula or arithmetic step shown in the question and