One side of a rectangular field is 15 m and one of its diagonals is 17 m. Find the area of the field in meter square  Select the correct option.
A) 100  B) 110  C) 120  D) 130  E) 140

Rationale: "other side = ( ( 17 ) 2 - ( 15 ) 2 ) ( 1 / 2 ) = ( 289 - 225 ) ( 1 / 2 ) = ( 64 ) ( 1 / 2 ) = 8 m . area = ( 15 x 8 ) m 2 = 120 m 2 . option c"
Answer: C