For every 25 mm of rain falling on the avarage home, 5000 L runs off the roof. Some people use barrels to collect this rain water. Cecila's town usually has 2625mm of rain each year. How many litres of water can be collected by using barrels?

litersofWater=2525mm * 5000L/25mm

To calculate the amount of water that can be collected using barrels, we need to know the total rainfall and the conversion factor from millimeters to liters.

Given:

- The town receives an average of 2625 mm of rain per year.
- Every 25 mm of rain results in 5000 liters of runoff.

To find the total amount of water that can be collected, we need to divide the total rainfall by the given conversion factor.

First, we need to determine the number of times 25 mm goes into 2625 mm:

2625 mm ÷ 25 mm = 105

This means that there are 105 sets of 25 mm in 2625 mm.

Next, we need to multiply the number of sets by the amount of runoff per set:

105 sets × 5000 liters/set = 525,000 liters

Therefore, by using barrels, it is possible to collect 525,000 liters of water in Cecila's town each year.