Problem: two men a and b start from place x walking at 4 ½ kmph and 5 ¾ kmph respectively . how many km apart they are at the end of 4 ½ hours if they are walking in the same direction ?
Rationale: "rs = 5 ¾ - 4 ½ = 1 ¼ t = 4 ½ h . d = 5 / 4 * 9 / 2 = 45 / 8 = 5 5 / 8 km answer : c"
annotated_formula: add(multiply(add(4, divide(const_1, const_2)), subtract(add(5, divide(const_3, 4)), add(4, divide(const_1, const_2)))), const_2)