-
A man travels 50 km at speed 25 km/h and next 40 km at 20 km/h and there after travels 90 km at 15 km/h. His average speed is :
-
- 18 kmph.
- 25 kmph.
- 20 kmph.
- 15 kmph.
Correct Option: A
Total distance covered
= (50 + 40 + 90) km
= 180 km
| Time = | |
| Speed |
| ∴ Total time taken = |  | + | + |  | hours | |||
| 25 | 20 | 15 |
= (2 + 2 + 6) hours
= 10 hours
| ∴ Average speed = | |
| Total time taken |
| = | = 18 kmph | |
| 10 |
