The side of a rhombus is 25 m and length of one of its diagonals is 10 m. The area of the rhombus is? Choose the most appropriate option.
A) 244.85  B) 224.95  C) 244.85  D) 224.95  E) 244.95

Rationale: "area of the rhombus = 1 / 2 * p * √ 4 ( a ) 2 - ( p ) 2 a = 25 ; p = 10 a = 1 / 2 * 10 * √ 4 ( 25 ) 2 - ( 10 ) 2 = 1 / 2 * 10 * √ 2500 - 100 = 1 / 2 * 10 * √ 2400 a = 244.95 answer : e"
Answer: E