A cube-shaped reservoir is filled with water in 45 minutes, how long it takes to fill a cube-shaped
| September 7, 2021 | education
A cube-shaped reservoir is filled with water in 45 minutes, how long it takes to fill a cube-shaped reservoir whose rib is 2 times larger.
Since the volume of a cube is directly proportional to the cube of its edge, a tank that has the shape of a cube with an edge twice the original has a volume 2 ^ 3 = 8 times the original.
This means that it will take 8 times longer to fill it out:
45 minutes * 8 = 360 minutes = 6 hours.
Answer: the second tank will fill up in 6 hours.
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