Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 2244 sq. metres. Pick: A) 25.4 B) 26.7 C) 24.3 D) 22.5 E) None of these
Explanation:   Clearly, the cow will graze a circular field of area 2244 sq. metres and radius   equal to the length of the rope.   Let the length of the rope be R metres.   Then, Π(R)2= 2244 =&gt; R2 = (2244 X (7/22)) = 714=&gt; R = 26.72   Length of the rope = 26.72 m.   Answer: Option 26.7
<result>B</result>
Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 2244 sq. metres.