One can always expect 2-3 questions from this topic in any competitive exam. The problems from this topic can be very complex in nature as it involves various logical concepts.Thus it becomes imperative to deeply understand the fundamentals of this chapter.
Note :
Note :
To solve any problem all units in the question must be uniform i.e. either all of them in m/s or km/hr.
Thus we must remember the conversion.
1 km/hr = 5 / 18 m/s and 1 m/s = 18/5 km/hr
Questions based on these concepts :
Q1. Speed of Milkha Singh is 40km/hr and Speed of Forrest Gump is 30km/hr.What's the ratio of time taken by them to cover the same distance ?
Q2. Milkha takes half the time taken by Forrest to run the same distance. Forrest takes 2 hours.What is the speed of Milkha if the speed of Forrest is 20 Km/hr ?
Explanation : There is nothing much to explain in question one. In Q2, we can easily arrive at the Ratio of speeds of Milkha and Forrest is inversely proportional to the Raio of Time taken by them, which makes it 2 : 1.
Now Speed of Forrest is 20 km/hr which is 20 times 1 therefore, speed of Milkha should be 20 times 2 = 40 Km/hr (Ans).
Thus we must remember the conversion.
1 km/hr = 5 / 18 m/s and 1 m/s = 18/5 km/hr
Questions based on these concepts :
Q1. Speed of Milkha Singh is 40km/hr and Speed of Forrest Gump is 30km/hr.What's the ratio of time taken by them to cover the same distance ?
Q2. Milkha takes half the time taken by Forrest to run the same distance. Forrest takes 2 hours.What is the speed of Milkha if the speed of Forrest is 20 Km/hr ?
Explanation : There is nothing much to explain in question one. In Q2, we can easily arrive at the Ratio of speeds of Milkha and Forrest is inversely proportional to the Raio of Time taken by them, which makes it 2 : 1.
Now Speed of Forrest is 20 km/hr which is 20 times 1 therefore, speed of Milkha should be 20 times 2 = 40 Km/hr (Ans).
