Aboat goes 240 miles downstream in the same time it can go 160 miles upstream. the speed of the current is 5 miles per hour. what is the speed of the boat in still water?

25 mph.

Step-by-step explanation:

Le tx mph be the speed of the boat in still water. Then the speed going downstream is x+5 mph and the speed going upstream is x-5 mph.

1. A boat goes 240 miles downstream and it took it

2. A boat goes 160 miles upstream and it took it

Then

9

step-by-step explanation:

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: