Question

The house Trevor's family lives in has 6 people (including Trevor) and 3 bathrooms. In the past month, each person showered for an average of 480 minutes and used an average of 72 liters of shower water (over the entire month). Water costs 0.20 dollars per liter. How much did Trevor's family pay per minute for shower water?

Answer 1

So, Trevor's family paid $0.03 per minute for shower water.

Explanation:

To find out how much Trevor's family paid per minute for shower water, you can follow these steps:

Calculate the total water usage for the family over the month:

Total water used per person per month = 72 liters

Total water used for 6 people = 6 * 72 liters = 432 liters

Calculate the cost of the total water usage:

Cost per liter of water = $0.20

Total cost of water = (Cost per liter) * (Total water used) = $0.20/liter * 432 liters = $86.40

Calculate the total minutes of showering for the family over the month:

Minutes per person per month = 480 minutes

Total minutes of showering for 6 people = 6 * 480 minutes = 2880 minutes

Calculate the cost per minute of shower water:

Cost per minute = (Total cost of water) / (Total minutes of showering)

Cost per minute = $86.40 / 2880 minutes = $0.03 per minute