Question : A boat moves downstream at a rate of 8 km/hr and upstream at 4 km/hr. The speed of the boat in still water is:

Option 1: 4.5 km/hr

Option 2: 5 km/hr

Option 3: 6 km/hr

Option 4: 6.4 km/hr

Question : A boat goes 4 km upstream and 4 km downstream in an hour. The same boat goes 5 km downstream and 3 km upstream in 55 minutes. What is the speed (in km/hr) of the boat in still water?

Option 1: 6.5

Option 2: 7.75

Option 3: 9

Option 4: 10.5

Question : A boat moves 25 km upstream and 39 km downstream in 8 hours. It travels 35 km upstream and 52 km downstream in 11 hours. What is the speed of the stream if it travels at a uniform speed?

Option 1: 4 km/hr

Option 2: 5 km/hr

Option 3: 6 km/hr

Option 4: 3 km/hr

Question : A boat goes 20 km upstream and 44 km downstream in 8 hours. In 5 hours, it goes 15 km upstream and 22 km downstream. Determine the speed of the boat in still water.

Option 1: 6 km/h

Option 2: 10 km/h

Option 3: 8 km/h

Option 4: 7 km/h

Question : A boat covers 12 km upstream and 18 km downstream in 3 hours, while it covers 36 km upstream and 24 km downstream in $6\frac{1}{2}$ hours. What is the speed of the current?

Option 1: 1.5 km/hr

Option 2: 1 km/hr

Option 3: 2 km/hr

Option 4: 2.5 km/hr