Question

The speed of boat is 15 km /hour.A motor boat tank 4 hours 30 minutes to go 30 km upstream and downstream to the original point. find height of water​

Answer 1

Step-by-step explanation:

Let the speed of the stream be x km/hr

Then,

Speed downstream = (15 + x) km/hr

Speed upstream = (15 - x) km/hr

∴3015+x+3015−x=412⇒900225−x2=92⇒9x2=225⇒x2=25⇒x=5km/hr

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Answer 2

Please mark this answer as brainliest