A horse is tethered to one corner of a rectangular grassy field 36 m by 20 m with a rope 18 m long. Over how much area of the field can it graze?  Choose the correct answer
A) 154 cm2 B) 308 m2 C) 254 m2 D) 260 m2 E) None of these
Area of the shaded portion   = 1⁄4 × π × (18)2 = 254 m2   Answer 254 m2
<result>C</result>
A horse is tethered to one corner of a rectangular grassy field 36 m by 20 m with a rope 18 m long. Over how much area of the field can it graze?