a man can row 24 kmph in still water . it takes him thrice as long to row up as to row down the river . find the rate of the stream ?
"let man ' s rate upsteam be x kmph then his rate of downstream = 3 x kmph rate still water = 1 / 2 ( 3 x + x ) = 2 x 2 x = 24 x = 12 rate of upstream = 12 rate of downstream = 36 rate of stream 1 / 2 ( 36 - 12 ) = 12 kmph answer is b ."
divide(multiply(24, const_2), add(const_3, const_1))