18 A rectangular sheet of paper 35 om 21 cm can be transformed into the curved surface of a right
circular cylinder in two ways, i.e. either by rolling the paper along its length or along its breadth
Find the ratio of the volumes of the two cylinders thus formed.
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Answer:5 : 3
Step-by-step explanation:
rolling along length:
height = 30, circumference = 18
2πr = 18
r = 9/π
volume = π(81/π^2)(30) = 2430/π
rolling along breadth
height = 18
circumf = 30
2πr = 30
r = 15/π
Volume = π(225/π^2)(18) = 4050/π
ratio of volume breadth : volume of height
=(4050/π) : 2430/π
= 5 : 3
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