Problem: at 1 : 00 pm , a truck left city p and headed toward city q at a constant speed of 38 km / h . one hour later , a car left city q and headed toward city p along the same road at a constant speed of 42 km / h . if the distance between city p and city q is 378 km , at what time will the truck and the car meet each other ?
Rationale: "at 2 : 00 pm , the truck and the car are 340 km apart . the truck and the car complete a distance of 80 km each hour . the time it takes to meet is 340 / 80 = 4.25 hours . they will meet at 6 : 15 pm . the answer is d ."
annotated_formula: divide(subtract(divide(378, 38), 1), add(1, divide(42, 38)))