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Get access to the detailed solutions to the previous years questions asked in IIM IPMAT exam
As n lines are perpendicular to 5 parallel lines so selecting any 2 lines from n & any 2 lines from 5 will result in a rectangle.
Selecting 2 lines from n lines = nC2
(n – 9) (n + 8) = 0
n = 9, − 8
Lines can’t be negative in number so discard n= - 8
So value of n = 9