Two cyclists start from the same place in opposite directions. One goes towards North at 18 km/h and the other goes South at 22 km/h. What is the distance between them after 30 minutes? MCQ with Answer and Explanation
Two cyclists start from the same place in opposite directions. One goes towards North at 18 km/h and the other goes South at 22 km/h. What is the distance between them after 30 minutes?
A. 30 km
B. 25 km
C. 15 km
D. 20 km
Answer: Option D
Solution (By JKSSB Mock Tests)
Relative speed in opposite directions = 18 + 22 = 40 km/h. Time = 30 minutes = 0.5 hours. Distance = 40 * 0.5 = 20 km.
The speed of two cars are in the ratio 3 : 4. If the second car takes 3 hours to cover a certain distance, how much time will the first car take to cover the same distance?
Explanation:
Ratio of speeds = 3:4. Ratio of time taken (inverse of speed) = 4:3. Given 3 parts = 3 hours for the second car. Thus, 4 parts = 4 hours for the first car.
A dog spots a rabbit 200 meters away. The rabbit speeds off at 24 km/h and the dog pursues at 30 km/h. How much distance will the rabbit run before it is caught?
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