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With an average speed of 40 km/hr, a train reaches its destination in time. If it goes with an average speed of 35 km/hr, it is late by 15 minutes. The total journey is
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- 30 km
- 40 km
- 70 km
- 80 km
Correct Option: C
Let the length of journey be x km, then
| − | = | = | ||||
| 35 | 40 | 60 | 4 |
| ⇒ | = | ||
| 280 | 4 |
| ⇒ x = | = 70 km | |
| 4 |
