A dog takes 10 leaps for every 2 leaps of a hare. If one leap of the dog is equal to 2 leaps of the hare, the ratio of the speed of the dog to that of the hare is : Choose the correct choice from the following answers: A) 5 : 1 B) 10 : 1 C) 15 : 1 D) 20 : 1 E) 25 : 1

Rationale: "explanation : dog : hare = ( 10 * 2 ) leaps of hare : 2 leaps of hare = 20 : 2 . answer : b ) 10 : 1"
Answer: B