A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?

(A) 25 miles per sec (X)
(B) 60 miles per sec (X)
(C) 7 miles per sec ()
(D) 10 miles per sec (X)
(E) None of these (X)

Answers: A body can escape the gravitational pull of the earth if it is thrown up with a velocity of  7 miles per sec.