Cabincruiser

Question

A cabin cruiser traveling with the current went 60 mi in 3 hrs. Against the current, it took 5 hrs to travel the same distance. Find the rate of the cabin cruiser in calm water and the rate of the currec

Answer 1

60/3 = 20 mph with

60/5 = 12 mph against

 

The speed of the current adds to or subtracts from the speed of the boat in still water.

 

b + c = 20

b - c = 12

 

2b = 32

b = 16

 

16 + c = 20

c = 4

 

The cabin cruiser travels 16 mph in still water, and the current is 4 mph.