Two circular cylinders are formed by rolling two rectangular aluminum sheets each
of dimensions 12 m length and 5 m breadth, one by rolling along its length and the
other along its width. Find the ratio of their curved surface areas.
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ANSWER:- 1 : 1
Step-by-step explanation:
one cylinder will be of 12 m length and 5 m circumference.
=> curved surface= circumference× length
= 5×12 = 60m²
similarly other cylinder will be of 5 m length and 13 m circumference.
=> curved surface= 12×5= 60 m²
thus ratios are 1 : 1
NOTE:- IN BOTH CASES WE SEE THAT CURVED
SURFACE AREA = AREA OF RECTANGULAR
SHEET. THUS IN THIS TYPES OF QUESTION
WE NEED NOT TO CALCULATE THE CURVED
SURFACE BUT IT CALCULATED BY THE AREA OF
RECTANGULAR MATERIAL
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