Question

a cylinder is formed by folding a rectangular sheet along its breadth if the length of sheet is 10 cm and its breadth is 22 CM then find the radius of the cylinder (take pie 22/7​

Answer 1

Answer:

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Answer 2

Given info : a cylinder is formed by folding a rectangular sheet along its breadth if the length of sheet is 10 cm and its breadth is 22 cm.

To find : the radius of the cylinder is ...

solution : if a cylinder is formed by folding a rectangular sheet along its breadth, then breath of rectangle would be circumference of base of cylinder.

i.e., circumference of base = 2πr = 22 cm

⇒2 × 22/7 × r = 22

⇒r = 3.5 cm

Therefore the radius of cylinder is 3.5 cm.

and the curve surface area of cylinder = 2πrl

= 22cm × 10 cm = 220 cm²