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A rectangular prism has a base area of 36 cm². If its height is increased by 25% from the original height of 12 cm, what is the new volume?

1. 432 cm³
2. 486 cm³
3. 504 cm³
4. 540 cm³

Correct answer: 540 cm³

Solution

The original height is 12 cm, so after a 25% increase it becomes 15 cm. Volume of a rectangular prism = base area × height = 36 × 15 = 540 cm³. Hence the new volume is 540 cm³.

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