Speed Distance and Time Shortcut and Tricks

September 9, 2023

Shortcuts for Speed Time and Distance

To solve speed distance and time as quickly as possible and reach to the best solution and a precise solution we must know some tips and tricks to solve it. On this page we have discussed about Shortcuts to solve speed distance and time.
 
tricks for solving speed distance and time questions

 The concept of Speed Time and Distance revolves around these basic formulas:

To find the solution to speed, distance, and time problems, you can use the following shortcuts:

  1. To find speed: Speed = \frac{Distance}{Time}.  Divide the distance traveled by the time taken to get the speed.

  2. To find distance: Distance = Speed × Time

    Multiply speed by the time taken to cover the distance

  3. To find time: Time = \frac{Distance}{Speed}

    Divide distance  by  speed to get the time taken.

These formulas are  useful in solving various problems related to speed, distance, and time. But keep in mind to use proper units.

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Speed Distance and Time Question and Answers
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Type: 1 Shortcut to find Average speed when time is same

Average Speed =\frac{Speed1 + Speed2}{2}

Example:

Musk travels 600 km at 50kmph. He then travels another 700km at 50kmph. What is the average speed?

Solution:

Time taken for 600km = 600/50 = 12 hours

Time taken for 700km = 700/50 = 14 hours

Since the time is same in both cases, use the above formula to find out the average speed.

S1 = 50

S2 = 50

Sa = (50+50)/2 = 50kmph

 

Type: 2 Shortcut to find Average speed when distances are same

Sa= \frac{2S1 \times S2}{S1 + S2}
Example:
Suraj Ranjhas  travels from his house to park at a speed of 70kmph. He suddenly returns home at a speed of 80 kmph. What is his average speed?
Solution:
S1 = 70
S2 = 80
Sa = 2(70×80)/(70+80)
= 11200/150
= 74.67 kmph

Type: 3 Shortcut to find time when two trains will meet
The distance between two cities Kanpur and Allahabad  is 560 Km. A train starts from Kanpur  at 8 a.m. and travel towards Allahabad at 120 km/hr. Another train starts from Allahabad at 9 a.m and travels towards Kanpur at 100 Km/hr. At what time do they meet?

Solution: 
A started at 8 a.m. and he covered 120 km by the time B started its journey.
Remaining distance = 560-120 = 440 km
Relative speed = 120 + 100 = 220 km/h ( We added both speed as they were running in same direction.
Now they will meet after 440/220 = 2 hours
now they will meet at 9 a.m. + 2 hours = 11 a.m

Type:4 Shortcut to find Least time to meet in a circular race

T1, T2, T3 are the  Individual times taken by  racers to complete one circle respectively .
Example:
Three persons participate in a race which was on a circular track  of length 600m. Ram, Rahul and Rajat participated  They can run at a speed of 2mps, 4mps and 5mps respectively. How long will they take to meet in the starting point for the first time?
Solution:
Time taken by each person to complete one circle
Ram = 600/2 = 300 seconds = T1
Rahul = 600/4 = 150 seconds = T2
Rajat = 600/5 = 120 seconds = T3
LCM(T1, T2, T3) = 600 seconds
Time taken by them to meet at starting point for the first time = 600 seconds.

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Speed Distance and Time Question and Answers
Speed Distance and Time Important Formulas
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