Question

The volume of a fish tank is 20 cubic feet. If the density is 0.2 (fish over feet cubed), how many fish are in the tank?

2
4
50
100

Answer 1

0.2 per 1 cubic feet
times 20
4 per 20 cubic feet


4 fish

Answer 2

B. 4

Explanation:

We have been given that the volume of a fish tank is 20 cubic feet. The density is 0.2 (fish over feet cubed). We are asked to find the number of fish in the tank.

We will use density formula to solve our given problem.

`\text{Density}=\frac{\text{Mass}}{\text{Volume}}`

Substituting our given values in above formula we will get,

`\frac{0.2\text{ fish}}{\text{ft}^3}=\frac{\text{Mass}}{20\text{ ft}^3}`

`\frac{0.2\text{ fish}}{\text{ft}^3}* 20\text{ ft}^3=\frac{\text{Mass}}{20\text{ ft}^3}* 20\text{ ft}^3`

`\frac{0.2\text{ fish}}{\text{ft}^3}* 20\text{ ft}^3=\text{Mass}`

`0.2\text{ fish}* 20=\text{Mass}`

`4\text{ fish}=\text{Mass}`

Therefore, there are 4 fish in the tank and option B is the correct choice.