This math topic covers problems involving the calculation of speed, given that two cars travel the same distance but with different speeds and different arrival times. Specific areas include solving for the unknown speed of one car when the speed of the other car, the travel distance, and the time difference in their arrivals are known. It is part of an advanced unit on speed, distance, and time. The topic requires an understanding and application of basic principles of speed (distance/time) and algebra to find the unknown variables. Each problem includes multiple-choice answers.
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Car A and Car B both travel 100 km Car A goes 50 km/hr and arrives 1 hr later than Car B. How fast is Car B going in km/hr?