Question

You are putting a rectangular hot tub on your back porch. It is 6 feet long, 5 feet wide, and 3 feet deep. How much will it cost to fill the hot tub if water costs $5 per 1000 gallons?

Answer 1

Answer:

$Cost=\ 3.66234\approx \ 3.67$

Step-by-step explanation:

$Height\ of\ tub=3\ feet\\\\Length\ of\ tub=6\ feet\\\\width\ of\ tub=5\ feet\\\\Volume=Length\times Width\times Height\\\\Volume=6\times 5\times 3=90\ feet^3$

$1\ feet^3=7.48052\ gallons\\\\90\ feet^3=90\times 7.48052=673.2468\ gallons$

$cost\ of\ 1000\ gallons=\ 5\\\\cost\ of\ 1\ gallons=\ \frac{5}{1000}\\\\cost\ of\ 673.2468\ gallons=\ \frac{5}{1000}\times 673.2468=\ 3.366234$