The speed of a boat in still water is 16 km/hour . It goes 60 km upstream and return downstream to starting point in 8 hours . Find the speed of the stream.
Answer:
4 km/hour
- Let the speed of stream be x km/hour.
- Thus,
Downstream speed = (16+x) km/hour
Upstream speed = (16−x) km/hour - Its is given that, total time taken = 8 hours
So, 6016−x+6016+x=8⟹60(16+x)+60(16−x)(16−x)(16+x)=8⟹1920256−x2=8⟹240256−x2=1⟹x2=256−240=16⟹x=4 km/hour - Hence, the speed of the stream is 4 km/hour.