A man can row 8 kmph in still water. When the river is running at 1.8 kmph, it takes him 2 hour to row to a place and back. What is the total distance traveled by the man?	Choose one.
A) 8.2 km	B) 6.7 km	C) 7.6 km	D) 7.4 km	E) 6.3 km

Rationale: "m = 8 s = 1.8 ds = 9.8 us = 6.2 x / 9.8 + x / 6.2 = 1 x = 3.8 d = 2.88 * 2 = 7.6 answer : c"
Answer: C