One side of a rectangular field is 15 m and one of its diagonal is 18 m. Find the area of the field.  Pick one
A) 100
B) 120
C) 150
D) 148.5
E) none

Rationale: "solution other side = √ ( 18 ) 2 - ( 15 ) 2 = √ 324 - 225 = √ 99 = 9.9 m . ∴ area = ( 15 x 9.9 ) m 2 = 148.5 m 2 . answer d"
Answer: D