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Mathematics Past Questions and Answers

Topic: Surface areas and Volumes of simple solids

Jamb Mathematics Questions - Surface areas and Volumes of simple solids

Question 46:
A frustrum of pyramid with square base has its upper and lower sections as squares of sizes 2m and 5m respectively and the distance between them 6m. Find the height of the pyramid from which the frustrum was obtained.
  • A 8.0 m
  • B 8.4 m
  • C 9.0 m
  • D 10.0 m
View Answer & Explanation
Question 47:
A bowl is designed by revolving completely the area enclosed by y = x2 - 1, y = 3 and x ≥ 0 around the axis. What is the volume of this bowl?
  • A 7π cubic units
  • B 15π/2 cubic units
  • C 8π cubic units
  • D 17π/2 cubic units
View Answer & Explanation
Question 48:
If the volume of a hemisphere is increasing at a steady rate of 18π m\(^{3}\) s\(^{-1}\), at what rate is its radius changing when its is 6m?
  • A 2.50m/s
  • B 2.00 m/s
  • C 0.25 m/s
  • D 0.20 m/s
View Answer & Explanation
Question 49:
A cylindrical tank has a capacity of 3080 m3. What is the depth of the tank if the diameter of its base is 14 m?
(Take pi = 22/7)
  • A 23 m
  • B 25 m
  • C 20 m
  • D 22 m
View Answer & Explanation
Question 50:
Find the rate of change of the volume, V of a sphere with respect to its radius, r when r = 1.
  • A 12π
  • B
  • C 24π
  • D
View Answer & Explanation