A dog takes 2 leaps for every 3 leaps of a hare. If one leap of the dog is equal to 5 leaps of the hare, the ratio of the speed of the dog to that of the hare is :  Pick one.
A) 9 : 3
B) 3 : 10
C) 2 : 3
D) 6 : 3
E) 10 : 3

Rationale: "explanation : dog : hare = ( 2 * 5 ) leaps of hare : 3 leaps of hare = 10 : 3 answer : e"
Answer: E