Question 48
Mensuration of SolidsThe diagram shows a triangular prism of length 7 cm. The right-angled triangle PQR is a cross-section of the prism. |PR| = 5 cm and |RQ| = 3 cm. What is the volume of the prism?
- A.28 cm3
- B.42 cm3
- C.70 cm3
- D.84 cm3
Show the answer and explanation
Answer: B (42 cm3)
Explanation
Volume = cross-section × length = 6 × 7 = 42 cm3.