The distance between two towns is 380 km. At the same moment, a passenger car and a truck start moving towards each other from different towns. They meet 4 hours later. If the car drives 5 km/hr faster than the truck, what is the truck's speed?  Choose the correct choice.
A) 35km/hr  B) 40km/hr  C) 76km/hr  D) 60km/hr  E) 50km/hr
The main idea used in this kind of problems is that the distance equals speed multiplied by time S=V⋅tS=V⋅t   V (km/hr)	t (hr)	S (km)   Car	x + 5	4	4(x +5)   Truck	X	4	4x   4(x+5)+4x=380   4x+4x=380−20   8x=360   x=360/8= 
<gadget id="calculator">360/8</gadget>
<output>45</output>
45   Therefore the truck's speed is 45 km/hr, and the car's speed is 50 km/hr.   correct answer 50km/hr
<result>E</result>
The distance between two towns is 380 km. At the same moment, a passenger car and a truck start moving towards each other from different towns. They meet 4 hours later. If the car drives 5 km/hr faster than the truck, what is the truck's speed?