One side of a rectangular field is 15 m and one of its diagonal is 18 m. Find the area of the field.  Pick.
A) 100 B) 120 C) 150 D) 148.5 E) None
Solution   Other side = √(18)2 - (15)2   = √324 - 225= 
<gadget id="calculator">324 - 225</gadget>
<output>99</output>
√99= 9.9 m.   ∴ Area = (15 x 9.9)m2 = 148.5 m2.   Answer 148.5
<result>D</result>
One side of a rectangular field is 15 m and one of its diagonal is 18 m. Find the area of the field.