Time Speed Distance
Practice Questions - Time Speed and Distance
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Q1) A person travels half of the distance at a speed of 40 Km/hour and the other half at 60 Km/hr. Find
the average speed for the entire journey? 1) 50 Km/hr 2) 54 Km/hr 3) 45 Km/hr 4) 48 Km/hr
Apply shortcut 1. Average speed = 48 Km/hr Hence, option 4. Q2) A person travels at a speed of 36 Km/hour for half of the time and at 54 Km/hour for other half of the time. Find the average speed for the entire journey? 1) 43.2 Km/hr 2) 49 Km/hr 3) 45 Km/hr 4) 48 Km/hr
Apply shortcut 2. Average speed = 45 Km/hr Hence, option 3. Q3) If 240 Km are travelled in 5 hours then by how much should the speed be increased in order to cover this distance in 4 hours? 1) 60 Km/hr 2) 12 Km/hr 3) 80 Km/hr 4) 48 Km/hr
Current speed = 240/5 = 48 Km/hr Required speed = 240/4 = 60 Km/hr Increase in speed = 60 - 48 = 12 Km/hr Hence, option 2. Read More: Mixtures (Concept with Example)Q4) Walking at 3/4th of the usual speed a person reaches his office 9 minutes late. At what time should he start from his home if he wants to reach his office at 9:15 AM by walking at his usual speed?1) 8:48 AM 2) 8:58 AM 3) 8:57 AM 4) 8:39 AM
When speed becomes 3/4th then, time taken becomes 4/3rd Let usual time taken be T minutes. So, ATQ  So, in order to reach his office at 9:15 AM he should start from his home at 8:48 AM. Hence, option 1. Q5) If Arti walks at 9 Km/hour instead of 7.5 Km/hour then she travels 6 Km more. Find the distance travelled by Arti? 1) 36 Km 2) 24 Km 3) 42 Km 4) 30 Km
When Arti increases her by 1.5 km/hour then she travels 6 Km more i.e. time = 6/1.5 = 4 hours Distance travelled = 7.5×4 = 30 Km Hence, option 4. |