(2) Let 1 leap of cat = 4 m and 1 leap of dog = 5 m Then, distance travelled by cat in 1 unit time = 4 × 7 = 28 m The distance travelled by dog in 1 unit time = 5 × 5 = 25 m Since for constant time, speed is proportional to distance. Hence, the ratio between the speed of cat and that of dog = 28 : 25.