Directions: Shivi drives her car in three different ways to reach the destination. Determine the average speed during this journey.
|
Way |
Speed (km/h) |
Distance (km) |
|
A |
38 |
114 |
|
B |
42 |
84 |
|
C |
46 |
230 |
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 42.8 km/hr.
Average speed = Total distance/Total time
Time taken by A = 114/38 = 3 hrs
Time taken by B = 84/42 = 2 hrs
Time taken by C = 230/46 = 5 hrs
Total distance = 114 + 84 + 230 = 428 km
Total time = 3 + 2 + 5 = 10 hrs
Average speed = 428/10 = 42.8 km/hr