a man can row 5 kmph in still water . when the river is running at 1.2 kmph , it takes him 1 hour to row to a place and black . how far is the place ?
"m = 5 s = 1.2 ds = 5 + 1.2 = 6.2 us = 5 - 1.2 = 3.8 x / 6.2 + x / 3.8 = 1 x = 2.35 . answer : b"
multiply(divide(multiply(add(5, 1.2), subtract(5, 1.2)), add(add(5, 1.2), subtract(5, 1.2))), const_2)