DIRECTIONS: Passage ? 1 Read the passage given below and answer the questions that follow A horse is tied to a pole fixed at one corner of a \[30\,m\times 30\,m\] square field of grass, by means of 10 m long rope. The area of that part of the field in which the horse can graze is

• A.  \[78.5\,{{m}^{2}}\]         
• B.  \[77\,{{m}^{2}}\]
• C.  \[76\,{{m}^{2}}\]                           
• D.  \[75\,{{m}^{2}}\]