Kelli swam upstream for some distance in one hour. she then swam downstream for the same distance in only 6 minutes. if the river flows at 5 km/hr, how fast can kelli swim in still water?

6.11 km/hr

Step-by-step explanation:

We will use the distance equation:

Where D is distance (in km), r is the speed/rate (in km/hr), and t is the time taken (in hours)

where c is current rate (river flow rate)

kelli swam upstream for some distance in one hour:

We can write

she then swam downstream for the same distance in only 6 minutes:

* note 6 minutes in hours is hr

We can write

Since the river flows at 5km/hr, c is 5 and total distance is equal, so we can equate the distance and solve for r:

In decimal, 6.11 km/hr. This is Kelli's speed in still water.

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i