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A bus moving at 40 km per hour covers a distance in 6 hours 15 minutes. If it travels the same distance at 50 km per hour how long will it take to cover the distance ?
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- 2 hrs.
- 6 hrs.
- 4 hrs.
- 5 hrs.
Correct Option: D
Distance = Speed × TIme
| = |  | 40 × 6 |  | km | |
| 4 |
| = | | | km = 250 km | |
| 4 |
New speed = 50 kmph
∴ Required time
| = | = | = 5 hours | ||
| Speed | 50 |
Second Method :
| Here, S1 = 40, t1 = 6 | = | ||
| 60 | 4 |
S2 = 50, t2 = ?
S1t1 = S2t2
| 40 × | = 50 × t2 | |
| 4 |
t2 = 5 hrs.
