denominatmotor boat goes downstream and covers a distance in 4 hours w

1.	denominatmotor boat goes downstream and covers a distance in 4 hours while it coversthe same distance upstream in 5 hours. If the speed of the stream is 3 km/hr, findthe speed of the motor boat in still water.
Answer» Let speed of boat in still water be v. Speed of stream = 3 km/hr As distance cover upstream and down stream is same Then,For upstreamDistance = (v - 3)5 For downstreamDistance = (v + 3)4 (v - 3)5 = (v + 3)45v - 15 = 4v = 125v - 4v = 15 + 12v = 27 Therefore,Speed of boat in still water = 27 km/hr

denominatmotor boat goes downstream and covers a distance in 4 hours while it coversthe same distance upstream in 5 hours. If the speed of the stream is 3 km/hr, findthe speed of the motor boat in still water.

Answer»

Let speed of boat in still water be v.

Speed of stream = 3 km/hr

As distance cover upstream and down stream is same

Then,For upstreamDistance = (v - 3)*5

For downstreamDistance = (v + 3)*4

(v - 3)*5 = (v + 3)*45v - 15 = 4v = 125v - 4v = 15 + 12v = 27

Therefore,Speed of boat in still water = 27 km/hr