How do you find the area of a roller?

The formula for finding the lateral area of a right circular cylinder is: \[\text{L=}2\pi rh…… (1)\] where L is the lateral surface area of the cylinder, r is the radius of the cylinder and h is the cylinder’s height.

What is the shape of a garden roller?

Answer: The garden roller is in the shape of a right circular cylinder.

What is the diameter of a roller?

The diameter of a roller is 84 cm and its length is 120 cm. It takes 500 complete revolutions to move once over to level a playground.

How much area does the roller cover in one full revolution?

4.4 square meters
So, r = 702=35 cm= 0.35 m (As radius is half of the diameter.) Thus the area covered by the roller in one revolution will be 4.4 square meters.

What is the curved surface area of cylinder?

2πrh
The radius ‘r’ of a cylinder is the radius of its base. Now, the area of the rectangle = length × breadth. 2πr is the circumference of the circle and h is the height. Area of the curved surface will be = 2πr × h = 2πrh.

How do you find the TSA of a cylinder?

The formula to calculate the total surface area of a cylinder is given as, the total surface area of cylinder = 2πr(h + r), while the curved surface area of cylinder formula is, curved/lateral surface area of cylinder = 2πrh, where ‘r’ is the radius of the base and ‘h’ is the height of the cylinder.

How do you find the area of one revolution?

Its width is its height = 120 cm. It is a cylinder. Therefore its area covered in one revolution is 2 ×3.14×70×120 = 52572 cm².

How do you find the surface area of cylinders?

What is TSA of hollow cylinder?

TSA of cylinder =2πrh+2πr2 which is lateral surface area of cylinder plus area of 2 circles. While in hollow cylinder bases are subtracted from external cylinder and are added to lateral surface area of two cylinder i.e. =2πRh+2πrh+2πR2−2πr2h . Maths.

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