[PPSC Accountant 2022]

6. A boat whose speed is 15 km/hr in still water goes 30 km downstream and comes back in total of 4 hr 30 min. The speed of stream is

1. 4 km/hr

2. 5 km/hr

3. 6 km/hr

4. 7 km/hr

Correct Answer :

5 km/hr