The perimeter of a triangle is 36 cm and the inradius of the triangle is 2.5 cm. What is the area of the triangle Pick
A) 72
B) 45
C) 729
D) 34
E) 35

Rationale: "explanation : area of a triangle = r * s where r is the inradius and s is the semi perimeter of the triangle . area of triangle = 2.5 * 36 / 2 = 45 cm 2 answer : option b"
Answer: B