a man can row 7 kmph in still water . when the river is running at 1.2 kmph , it takes him 1 hour to row to a place and back . what is the total distance traveled by the man ?
"m = 7 s = 1.2 ds = 8.2 us = 5.8 x / 8.2 + x / 5.8 = 1 x = 3.40 d = 3.40 * 2 = 6.79 answer : c"
multiply(divide(multiply(add(7, 1.2), subtract(7, 1.2)), add(add(7, 1.2), subtract(7, 1.2))), const_2)