An apparatus equipped with a 1,000-gallon tank that supplies two pre-connected handlines flowing 150 GPM and 100 GPM will supply the lines for how many minutes?

To determine how long the apparatus can supply both handlines, you first need to calculate the total flow rate of water being used by the handlines. In this scenario, one handline flows at 150 gallons per minute (GPM) and the other at 100 GPM. By adding these two flow rates together, you find the total demand:

150 GPM + 100 GPM = 250 GPM.

Next, you can calculate how long the 1,000-gallon tank will last at this combined flow rate. To do this, divide the total amount of water in the tank by the total flow rate:

1,000 gallons ÷ 250 GPM = 4 minutes.

Therefore, the apparatus can supply both handlines for a duration of four minutes before the tank runs out of water. This calculation reflects a straightforward application of flow rates and determines the effective time a water supply can sustain multiple lines during firefighting operations.