Mathematics
Medium
Question
The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is_______?
A
5km/hr
✓ Official correct answer
B
8 km/hr
C
10 km/hr
D
15 km/hr
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
5km/hr
No member explanations yet for this option.
B
8 km/hr
No member explanations yet for this option.
C
10 km/hr
No member explanations yet for this option.
D
15 km/hr
No member explanations yet for this option.