peter and tom shared the driving on a certain trip . if peter and tom both drove for the same amount of time , but peter only drove 3 / 5 of the total distance , what was the ratio of peter ' s average speed to tom ' s average speed ?
"the answer is suppose to be b . 3 : 2 . it ' s from the gmatprep answer : option b"
divide(subtract(const_1, divide(const_2.0, 5)), divide(3, 5))