1.

A motorboat covers a certain distance down stream in a river in 5 hours. It covers thesame distance upstream in 5 1/2 hours. If the speed of the stream is 1.5 Kmph . Findthe speed of the boat.

Answer»

Answer:

Step-by-step EXPLANATION:

LET the speed of boat be x

Speed upstream = x-1.5

Speed downstream = x+1.5

Since the upstream and downstream DISTANCE is same.

(x+1.5)5 = (x-1.5)5.5

5X + 1.5*5 = 5.5x - 1.5*5.5

5.5x - 5x = 1.5*5.5 + 1.5*5

0.5x = 1.5*10.5

x = 1.5*10.5/0.5

x = 3*10.5 = 30.5

Speed of boat = 30.5 km/hr



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