The motorcycle and the car departed from A point simultaneously toward 105 km away B point.
There is a the traffic jam section (section which it is crowded and cannot be run fast) on the way.
It took two hours for a car and one hour for a motorcycle to pass through the section.
The motorcycle arrived at B point 45 minutes earlier than the car. Except the traffic jam section, a car advances at 75 km/h and a motorcycle advances at 60 km/h.
They progress with fixed speed respectively also in the traffic jam section.
Find the distance of the traffic jam section.