Mohan finishes a journey by scooter in 5 hours. He travels the first half of the journey at 30 km/h and the second half of the journey at 20 km/h. The distance covered by him is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e 120 km.
| Understanding/Application |
|
Let the total distance covered by Mohan be x. Time taken by Mohan to cover the first half = (x/2)/30 = x/60 Time taken by Mohan to cover the next half = (x/2)/20 = x/40 Total time for the journey = 5 hours |
|
x/60 + x/40 = 5 (2x + 3x)/120 = 5 5x/120 = 5 x = 120 |