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CAT-2003-Previous Years Paper
Consider a cylinder of height h cm and radius r = as shown in the figure (not drawn to scale). A string of a certain length, when wound on its cylindrical surface, starting at point A and ending at point B, gives a maximum of n turns (in other words, the string’s length is the minimum length required to wind n turns).
In the set-up of the previous two questions, how is h related to n?
A B C h = n D
As h/n = Number of turns = 1 (as given). Hence h = n.