Question

A certain distance is covered at a certain speed. If one-third of the distance is covered in thrice time, what is the ratio of two speeds?

• A. 9 ∶ 4
• B. 19 ∶ 1
• C. 9 ∶ 1
• D. 1 ∶ 9

Answer 1

Answer:

C. 9 ∶ 1

Let the total distance be x km Time be y hr ⇒ Speed in first case = x/y km/hr Distance covered in the second case = x/3 Time in second case = 3y hr ⇒ Speed in second case = (x/3)/3y km/hr ⇒ (x/y) ∶ (x/3)/3y ⇒ 1 ∶ (1/9) ⇒ 9 ∶ 1