Question

2.

HNUB
The water flow rate of a regular shower head is 3.5 gallons per minute. At
this rate, it would cost $1.90 for the water used for a 10-minute shower.
What is the cost, rounded to the nearest cent, of 1 gallon of water?

Answer 1

Answer: 5 cents

Explanation:

Given

Flow rate of water is
`3.5\ gal/min`

At this rate it cots
`\$1.90` for 10 minutes

Volume that flown in this time

`\Rightarrow V=3.5* 10\\\Rightarrow V=35\ \text{Gallons}`

So,
`\$1.90` is charged for 35 gallons of water

Using unitary method, 1 gallon costs

`\Rightarrow 1\ \text{gallon}=(1.9)/(35)\\\\\Rightarrow 1\ \text{gallon}=\$0.0542\ \text{or}\ 5.4\ \text{cents}\\\text{Round off to nearest cent}\\\Rightarrow 1\ \text{gallon}=5\ \text{cents}`