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A car completed a journey of 400 km in 12 1 hrs. 2
Calculate the speed for the rest of the journey.The first 3 th of the journey was done at 30 km/hr. 4
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- 45 km/hr
- 25 km/hr
- 40 km/hr
- 30 km/hr
Correct Option: C
Total distance covered = 400 km.
| Total time = | hours | |
| 2 |
| ∴ | th of total journey | |
| 4 |
| = | × 400 = 300 km. | |
| 4 |
| Time taken = | |
| Speed |
| = | = 10 hours | |
| 30 |
| Remaining time = | − 2 | |
| 2 |
| = | = | hours | ||
| 2 | 2 |
Remaining distance = 100 km.
| ∴ Required speed of car = | |||||
| 2 | |||||
| = | = 40 kmph. | |
| 5 |
