A rope of which a calf is tied is increased from 12 m to 25 m, how much additional grassy ground shall it graze?	Select:
A) 1400
B) 141.71
C) 1210
D) 1511.71
E) 1500
π (252 – 122) =1511.71   Answer: 1511.71
<result>D</result>
A rope of which a calf is tied is increased from 12 m to 25 m, how much additional grassy ground shall it graze?