A rope of which a calf is tied is increased from 10 m to 23 m, how much additional grassy ground shall it graze?
Choose the correct choice from the following:
A) 1217	B) 1348.2	C) 1210	D) 1212	E) 1312

Rationale: π ( 232 – 102 ) = 1348.2 answer : b
Answer: B