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# The volume of a fish tank is 30 cubic feet. If the density is 0.3 fish over feet cubed, how many fish are in the tank?

**Solution:**

Given volume of fish tank = 30 cubic feet

Density = 0.3 fish over feet cubed

Density can be defined as the ratio of mass per unit volume

We know density = number/ volume

Number of fishes = density × volume

= 0.3 × 30

= 3 × 3

= 9

The volume of a fish tank is 30 cubic feet. If the density is 0.3 fish over feet cubed, how many fish are in the tank?

**Summary: **

Thus, if the volume of a fish tank is 30 cubic feet and the density is 0.3 fish over feet cubed then the number of fishes are 9.

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