A cat leaps 5 leaps for every 4 leaps of a dog, but 3 leaps of the dog are equal to 4 leaps of the cat. What is the ratio of the speed of the cat to that of the dog?
Select:
A) 11:15
B) 15:11
C) 16:15
D) 15:16
E) 11:16
Solution: Given;   3dog = 4 cat;   Or, dog/cat = 4/3;   Let cat's 1 leap = 3 meter and dogs 1 leap = 4 meter.   Then, ratio of speed of cat and dog = 3*5/4*4= 
<gadget id="calculator">3*5/4*4</gadget>
<output>15</output>
15:16.''Answer: Option 15:16
<result>D</result>
A cat leaps 5 leaps for every 4 leaps of a dog, but 3 leaps of the dog are equal to 4 leaps of the cat. What is the ratio of the speed of the cat to that of the dog?