Question

The rectangle given below is rolled along its length and is made into a cylinder. The perimeter of the circular base so formed is 10 m. What is the lateral surface area of the cylinder formed?

• A. $60m^2$
• B. $80m^2$
• C. $100m^2$
• D. $120m^2$

Answer 1

The correct option is A $60m^2$

As per the question:
The rectangle given above is rolled along its length. Also, the perimeter of the circular base so formed is $10m$.
As we had seen in the videos, when we cut a cylinder and open it we get a rectangle.
Therefore, the lateral surface area of cylinder = Area of rectangle = $6\times 10=60m^2$