1.

A boat moves with a speed of 5 km/h relative to the water in the river flowing with speed of 3 km/h and having a width of 1 km. The time taken by the boat to cross the river by shortest path will be?

Answer»

tion:SPEED of boat = 5km/hspeed of stream = 3km/h since, both boat and flow of stream is in the same direction therefore,RELATIVE speed = 5-3 = 2km/hwidth of river(distance) = 1kmtime = distance/speed TIME taken by the boat to cross the river by Shortest path = 1/2 HRS = (1/2)×60 = 30 minutes



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