"Published in Newark, California, USA"
A motorist has to travel 3.50 km in a city where his average speed should not exceed 25 km/hr. If he increases his average speed to 40 km/hr, how much time will he gain in his journey?
Solution:
The given problem is about rate, distance, and time problem in which the average speed is increased. Let's assume that the distance for the two cases is the same which is 3.50 km.
If the speed limit in a city is 25 km/hr, then his travel time is
If he increased his speed to 40 km/hr, then his travel time is
Therefore, his travel time will gain by
