Question

A man row upstream in still water at 3km/h and back to same place at 5km/h ;he takes 48 minutes altogether .How far upstream did he go ?​

Answer 1

Answer:

Speed upstream = 20/6 = 10/3 kmph = 3.33 kmph

Speed downstream = 18/4 = 9/2 kmph = 4.5 kmph

Speed of boat in still water = 1/2(Speed downstream+ Speed upstream)

= 1/2(4.5 + 3.33) = 3.92 kmph

Speed of the water current = 1/2(Speed downstream - Speed upstream)

= 1/2(4.5 - 3.33) =0.59 kmph

solve like this.