Saved Bookmarks
| 1. |
Two cities P and Q are 360 km apart from each other. A car goes from P to Q with a speed of 40km per hour and returns back to P with a speed of 50 km per hour. Whta is the average speed of the car?1. 44.44 km per hour2. 48 km per hour3. 50 km per hour4. 55 km per hour |
|
Answer» Correct Answer - Option 1 : 44.44 km per hour Given: Distance between the two cities = 360 km Formula used: Average speed = Total distance/Total time Distance = Speed × Time Calculation: Time taken by car A to cover distance from P to Q = 360/40 = 9 hours Time taken by car A to cover distance from Q to P = 360/50 = 7.2 hours Average speed = (360 + 360)/(9 + 7.2) = 44.44 km/hr ∴ The average speed of the car is 44.44 km/hr |
|