Comprehension Passage
The speed of boat A in still water is 25% more than the speed of stream. After travelling for 4 hours in downstream, the speed of boat A in still water is increased by 4 km/h and it travelled for 6 hours more. While returning the speed of boat A in still water is further decreased by 6 km/h and the boat travelled for 5 hours. The total distance travelled by boat A is 394 km.
Find the total distance covered by boat A if it is travelled for 15 hours in downstream and for 25 hours in upstream with original speed?
1
650 km
2
640 km
3
580 km
4
450 km
5
570 km