Practice30Create account

Ravi finds the total surface area of a cylinder with r = 7 cm and h = 3 cm as 132 + 154 = 286 sq cm. What went wrong?

Class 8Surface Area of a CylinderMensuration
  • AHe used the wrong value of π
  • BHe added only one circular end
  • CHe should not add any ends
  • DHe used the diameter as the radius

Step-by-Step Solution

Curved part = is right. A closed cylinder has TWO ends of 154 each, so TSA = 132 + 308 = 440 sq cm.
Answer: B) He added only one circular end

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Surface Area of a Cylinder practice questions

More Class 8 Surface Area of a Cylinder practice

Two cylindrical pipes both have radius 7 cm. One is 10 cm long and the other is 15 cm…The table lists three tins. Which tin has the greatest curved surface area?A garden roller has diameter 70 cm and length 1 m. What area of lawn does it press in…An iron pipe 28 m long has an outer diameter of 4 cm. Find the area of its outer curved…A road roller is 120 cm long with diameter 84 cm. It takes 500 complete revolutions to…