Problems Based on Speed
Problems Based on Speed
Solving Statements Involving Speed:
In these types of problems we consider the relative speed of the two objects. When the two objects are moving in the same direction, the relative speed is the difference of the speed of the two objects. When the two objects are moving in the opposite direction , the relative speed is found as the sum of speed of the two objects.
Illustration: A train travels a distance of 300 km at a certain constant speed. If the speed of train is increased by 5 km an hour it takes two hours less . Find the original speed of train.
Solution: Let the speed of train = x km/h
distance= 300km
A train travels a distance of 300 km at a constant speed. If the speed of the train is increased by 5 km an hour, the journey would have taken 2 hours less. Find the original speed of the train. | |||
| Right Option : C | |||
| View Explanation | |||
On a journey of 100km, Meeta travels at a certain speed for the first 60km, and then increases his speed by 15km/h for the remainder. If the whole journey takes 2 hours, find his two speeds. | |||
| Right Option : D | |||
| View Explanation | |||
An express train covers 240 km at a certain speed. Another train, whose speed is 12 km/hr less, takes an hour longer to cover the same distance. Find the speed of the express train in km/hr. | |||
| Right Option : B | |||
| View Explanation | |||
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