Solution:
We know that:
- Volume of rectangular prism = L × B × H = 90 ft³
Substitute the length, breadth, and height to find the volume of the rectangular prism.
Now, let's simplify the LHS.
Further simplify the equation by dividing 9 both sides.
- => 9 × H/9 = 90 ft/9
- => H = 10 ft
Thus, the height of the rectangular prism is 10 feet.