Question

A boatman rows his boat 35 KM upstream and 55 KM downstream in 12 hrs he can row 30 KM upstream and 44 KM downstream in 10 hrs find the speed of the stream and that of the boat in still water hence find the total time taken by the boat man to row 50 km upstream and 77 Km downstream

Answer 1

the answer file is attached 

Answer 2

Total time taken =17 hrs

Speed of upstream=5

Speed of downstream=11