Question : The upstream speed of a boat is 8 km/h and the downstream is 15 km/h. What is the speed of the boat in still water and the speed of the stream (in km/h), respectively?

Option 1: 11 and 3

Option 2: 3 and 11

Option 3: 11.5 and 3.5

Option 4: 3.5 and 11.5

Question : A boat goes 75 km upstream in 3 hours and 60 km downstream in 1.5 hours. The speed of the boat in still water is:

Option 1: 32.5 km/h

Option 2: 30 km/h

Option 3: 65 km/h

Option 4: 60 km/h

Question : A boat can go 40 km downstream and 25 km upstream in 7 hours 30 minutes. It can go 48 km downstream and 36 km upstream in 10 hours. What is the speed (in km/hr) of the boat in still water?

Option 1: 6

Option 2: 12

Option 3: 9

Option 4: 15

Question : A boat goes 2 km upstream and 3 km downstream in 20 minutes. It goes 7 km upstream and 2 km downstream in 53 minutes. What is the speed (in km/hr) of the boat in still water?

Option 1: $\frac{75}{7}$

Option 2: $\frac{120}{7}$

Option 3: $\frac{135}{7}$

Option 4: $\frac{150}{7}$

Question : A boat goes 12 km downstream and comes back to the starting point in 3 hours. If the speed of the current is 3 km/h, then the speed (in km/h) of the boat in still water is:

Option 1: 12

Option 2: 9

Option 3: 8

Option 4: 6

Question : The speed of a boat in still water is 15 km/hr, and the speed of the current is 5 km/hr. In how much time (in hours) will the boat travel a distance of 60 km upstream and the same distance downstream?

Option 1: 20

Option 2: 12

Option 3: 9

Option 4: 10