A rope of which a calf is tied is increased from 12 m to 21 m, how much additional grassy ground shall it graze?
Select:
A) 933.4
B) 1219
C) 1210
D) 1212
E) 1312
π (212 – 122) = 933.4   933.4nswer:933.4
<result>A</result>
A rope of which a calf is tied is increased from 12 m to 21 m, how much additional grassy ground shall it graze?