Question

36. A boat goes 30 km upstream and 44 km downstream in 10 hours. It can
40 km upstream and 55 km downstream in 13 hours. Find the speed
of the stream and that of the boat in still water.
[CBSE 2019]
go​

Answer 1

Answer:

speed=distance/time

first case

30-40/10

-10/10=1s

second case

40-55/13

-15/13=1.15s