A rower can row 6 km/h in still water. When the river is running at 2 km/h, it takes the rower 1 hour to row to Big Rock and back. How many kilometers is it to Big Rock?  Choose the most appropriate option:
A) 2.21	B) 2.45	C) 2.67	D) 2.83	E) 2.95
Let x be the distance to Big Rock.   time = x/4 + x/8 = 1   x = 32/12 = 2.67 km   The answer is 2.67.
<result>C</result>
A rower can row 6 km/h in still water. When the river is running at 2 km/h, it takes the rower 1 hour to row to Big Rock and back. How many kilometers is it to Big Rock?