Practice30Create account

Cylinder A has radius 7 cm and height 10 cm. Cylinder B has radius 10 cm and height 7 cm. Compare their curved surface areas.

Class 8Surface Area of a CylinderMensuration
  • AB has the larger CSA
  • BThey are equal
  • CA has the larger CSA
  • DIt cannot be decided

Step-by-Step Solution

CSA = 2πrh depends on the product r × h. Both have r × h = 70, so 2π × 70 is the same for both (440 sq cm with π = 22/7). Their total surface areas differ, though.
Answer: B) They are equal

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

The net of a closed cylinder is shown: a rectangle with two circles. What is the total…Ravi finds the total surface area of a cylinder with r = 7 cm and h = 3 cm as 132 + 154…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…