A triangular prism has a base area of 30 cm2. If the height is increased by 25%, what is the new volume (original height was 12 cm)?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 450 cm3.
Volume of prism = Base area × Height
Initial volume of prism = 30 × 12
⇒ 360 cm
New height = 12 × 125/100 = 15 cm
New volume = Base area × New height
⇒ 30 × 15 = 450