Problem: two trains each 250 m in length are running on the same parallel lines in opposite directions with the speed of 90 kmph and 70 kmph respectively . in what time will they cross each other completely ?
Rationale: "explanation : d = 250 m + 250 m = 500 m rs = 90 + 70 = 160 * 5 / 18 = 400 / 9 t = 500 * 9 / 400 = 11.25 sec answer : option e"
annotated_formula: divide(250, multiply(90, const_0_2778))