The perimeter of a triangle is 28 cm and the inradius of the triangle is 2.5 cm. What is the area of the triangle? Choose the correct choice from the following answers:
A) 30 B) 31 C) 32 D) 34 E) 35

Rationale: 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 * 28 / 2 = 35 cm 2 answer : option e
Answer: E