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A rectangular piece of paper measuring 25cm by 21cm is rolled along its breadth to form a cylinder. Find the total surface area of the cylinder so formed.
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A rectangular piece of paper measuring 25cm by 21cm is

rolled along its breadth to form a cylinder. Find the total
surface area of the cylinder so formed.

User Debi
by
7.7k points

2 Answers

1 vote
The surface area is the area of the rectangle - it has been rolled so no different.

25 x 21 = 525 cm^2
User Bill Mote
by
8.5k points
4 votes

The area of the piece of paper is (25cm x 21cm) = 525 cm² .

There's no reason it should change when you bend the paper
into different shapes.
User Beau
by
7.8k points
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