Surface area of cylinders -
1. Sam has a cylindrical fish tank with an open top. The tank has height 30cm and radius 20cm. What is the total surface area of the tank?
2. A company manufactures and paints cylindrical chimneys with radius 12cm and height 25cm. The company has enough paint to cover a 12m2 area. How many chimneys can the company paint?
3. Calculate the curved surface area of the cylinder below. Give your answer to two decimal places.
4. A cylindrical drinks bottle has a paper label wrapped around the outside. The label has a height of 7cm and the bottle has a radius of 3cm. The label also has a 1.5cm overlap so that it can be stuck together and held into place. Calculate the area of the label.
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Answer:
the answer of 1st question is 6285.714
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