Question

The ratio between the speeds of two cars is 6 : 5. If the second car runs 600 km in 6 hours, then the speed of the first car is:

• A. 100 km/hr
• B. 120 km/hr
• C. 110 km/hr
• D. 90 km/hr

Answer 1

Answer:

B. 120 km/hr

Solution: Given: Ratio between the speeds of two cars is 6 : 5. Second car runs 600 km in 6 hours. Formula used: Speed = Distance/time Calculations: Let the speed of first and second cars be 6x and 5x. Speed = Distance/Time Speed of second car = 600/6 ⇒ 5x = 100 ⇒ x = 20 Speed of first car = 6x = 6 × 20 ⇒ 120 km/hr ∴ The speed of car is 120 km/hr.