Car A runs at the speed of 50km/hr & reaches its destination in 8hr. Car B runs at the speed of 25 km/h & reaches its destination in 4h. What is the respective ratio of distances covered by Car A & Car B? Choose the correct choice from the following answers:
A) 4 : 1  B) 11 : 8  C) 13 : 7  D) 15 : 7  E) 16 : 9

Rationale: "sol . distance travelled by car a = 50 × 8 = 400 km distance travelled by car b = 25 × 4 = 100 km ratio = 400 / 100 = 4 : 1 answer : a"
Answer: A