RRB NTPC Mains or Stage 2 Model Paper 3 with solutions

Question : 12 of 120

Marks: +1, -0

If each interior angle is double of each exterior angle of a regular polygon within sides, then the value of n is

Solution:

(2n - 4) ×90°/n=360°/n×2

(2n – 4)90° = 720

2n – 4 = 8

2n = 12

n = 6

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