At 1:00 pm, a truck left city P and headed toward City Q at a constant speed of 45 km/h. One hour later, a car left City Q and headed toward City P along the same road at a constant speed of 40 km/h. If the distance between City P and City Q is 300 km, at what time will the truck and the car meet each other?	Choices
A) 4:30 B) 5:00 C) 5:30 D) 6:00 E) 6:30
At 2:00 pm, the truck and the car are 255 km apart.   The truck and the car complete a distance of 85 km each hour.   The time it takes to meet is   255/85= 
<gadget id="calculator">  255/85</gadget>
<output>3</output>
3 hours.   They will meet at 5:00 pm.   The answer is 5:00.
<result>B</result>
At 1:00 pm, a truck left city P and headed toward City Q at a constant speed of 45 km/h. One hour later, a car left City Q and headed toward City P along the same road at a constant speed of 40 km/h. If the distance between City P and City Q is 300 km, at what time will the truck and the car meet each other?