# Math Help( Don’t need the answer I just need to know how to set up the problem)?

A shower has a flow rate of 2.3 gallons per minute. If a person takes an average of 6 showers per week and the average length of a shower is 15 minutes, then how much water is used in a year?

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Each 15 minute shower is going to use 15 times 2.3 gallons. Each week, there are going to be 6 of those- so 6 times (15X 2.3). There are 52 weeks in a year. It's just multiplication.

• One shower length is 15 minutes so the total amount of water used in is 15 time of 2.3 gallons. If the average 6 showers will be taken in the week so it 6 times of the total amount of water used in a shower it will give you total water used in a week. And there are 52 weeks in a year so it 52 times of total water used in a week. so simple multiplication and you will get the answer.

• a x b x c x d x e ... or whatever

• write out all the units when you multiply to make sure you cancel out everything properly

2.3 gallons/minute * 15 minutes/shower * 6 showers/week * 52 weeks/year = xxx gallons/year

see that the minutes, showers, weeks cancel out and you are left with gallons/year