Question 18
Mensuration of SolidsThe cross-section of a prism is a right-angled triangle 3cm by 4cm by 5cm. The height of the prism is 8cm. Calculate its volume
- A.48cm3
- B.60cm3
- C.96cm3
- D.120cm3
- E.240cm3
Show the answer and explanation
Answer: A (48cm3)
Explanation
The right angle is between the 3 cm and 4 cm sides, so the cross-section is ½ × 3 × 4 = 6 cm2. Volume = 6 × 8 = 48 cm3.