A Mason fixed black tiles of square shape around a square room. There are 21 tiles on each side of the room. How many tiles did he need altogether...? Mcqs

A Mason fixed black tiles of square shape around a square room. There are 21 tiles on each side of the room. How many tiles did he need altogether...?

(A) 88

(B) 76

(C) 80

(D) None of these

Source: This question is taken from the Assistant Punjab Police Department PPSC Past Paper