Question 28
Mensuration of SolidsThe dimensions of a rectangular base of a right pyramid are 9 cm by 5 cm. If the volume of the pyramid is 105 cm3, how high is the pyramid?
- A.10 cm
- B.6 cm
- C.8 cm
- D.7 cm
Show the answer and explanation
Answer: D (7 cm)
Explanation
Volume = ⅓ × base area × height: 105 = ⅓ × 45 × h = 15h, so h = 7 cm.