RRB NTPC Prelims Model Paper 4 with solutions

Question : 69 of 100

Marks: +1, -0

Each interior angle of a regular polygon is 18°more than eight times an exterior angle. The number of sides of the polygon is

Solution:

(3) Let the number of sides of polygon be p, then according to the question,

(2p- 4)/p× 90 =8 ×{4× 90}/p+ 18

⇒180p – 360 = 2880 + 18 p

⇒162 p = 3240⇒p = 20.

Go to Question:

Prev Question

Next Question