Truck P and Truck Q drive on the highway in the same direction at respective rates of 70 kph and 75 kph. If Truck Q is 5 km behind Truck P, by how much does Truck P need to increase the speed to catch up with Truck P in 20 minutes?	Choose the correct option:
A) 6 kph
B) 8 kph
C) 10 kph
D) 12 kph
E) 14 kph
Truck Q needs to gain 5 km in 20 minutes.   The relative speed difference needs to be 5 km / 20 minutes = 15 km/hour   Truck Q needs to increase up to 85 kph, thus an increase in 10 kph.   The answer is 10 kph.
<result>C</result>
Truck P and Truck Q drive on the highway in the same direction at respective rates of 70 kph and 75 kph. If Truck Q is 5 km behind Truck P, by how much does Truck P need to increase the speed to catch up with Truck P in 20 minutes?