A lorry left town a for town b at 6.50 pm at an average speed of 60 km/hr. After 1 hour 45 minutes a car left town A for B at an average speed of 90 km/hr. if A is 317 km from B determine:
a)The distance of the lorry from town B when the car took off
b)The distance the car travelled to catch up to the lorry
c)What time of the day did the car catch up with the lorry (Give your answer in 24 hour system)