Time Speed Distance for SSC CPO | Concepts & Practice

Learn the shortcut

Understand the fastest pattern for this topic before you attempt full MCQs.

Avoid common traps

See where students commonly lose marks so you can eliminate bad options earlier.

Solve faster in exam

Apply one practical method before attempting MCQs and cut down hesitation.

Summary Formula Tricks Mistakes Solved Example Practice FAQ

Time Speed Distance revision for SSC CPO: understand the base rule, apply the correct formula or relation, check common traps, then practise with approved questions.

Time, Speed and Distance are linked by distance = speed × time. The most common errors come from inconsistent units or comparing average speeds incorrectly.

SSC CPO focus: Solve the core method first, then use the approved practice questions on this page to build exam-speed accuracy.

Time Speed Distance revision rule: concept → formula/relation → one worked example → timed practice → error review.

Core concept
Key formula/relation
Common trap
Approved practice

D = ST
S = D/T
T = D/S
km/h to m/s: ×5/18; m/s to km/h: ×18/5

For equal distances at speeds a and b, average speed = 2ab/(a+b).

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Read the exact requirement before choosing a shortcut.
Keep units, signs and percentage bases consistent.
Use the final few seconds to verify direction and magnitude.

Using a memorised shortcut without checking its condition.
Skipping unit or base conversion.
Doing long arithmetic before identifying the underlying relation.

Practice example: A car covers 240 km in 4 hours and then 180 km in 3 hours. What is its average speed for the complete journey?

Solution: The average speed is 60 km/h.

A bus covers the first 120 km at 40 km/h and the next 180 km at 60 km/h. What is the average speed for the whole journey?
A car travels 150 km at 50 km/h and 210 km at 70 km/h. What is the average speed for the whole journey?
A cyclist covers 42 km in 2 hours 20 minutes. Find the average speed.

Learn the shortcut first

Shortcut before you solve

Most speed questions are easy once the units are made uniform first.

Faster solving steps

Use this 4-step method before solving to keep your thinking fast and repeatable.

Step 1 Identify relation

Spot the pattern, relationship, or core idea first.

Step 2 Apply same pattern

Use the same rule instead of re-solving from scratch.

Step 3 Eliminate wrong options

Remove confusing choices before comparing the last few.

Step 4 Confirm final answer

Pick the option that matches the shortcut most cleanly.

Practice Questions

Start with the first 10 questions free, then unlock the rest with premium

Now apply the trick on real questions

Use the shortcut above before solving these questions

Use S = D / T and convert units before solving.

Tip: To change km/h into m/s, multiply by 5/18. To change m/s into km/h, multiply by 18/5.

Step 1

Speed = Distance / Time.

Step 2

120 / 2 = 60 km/h.

Rule

Speed = Distance / Time, Distance = Speed x Time, Time = Distance / Speed.

3-second trick

First check the units, then apply the basic formula.

Trap to avoid

Do not mix metres and kilometres or seconds and hours in one formula.

Correct answer

60 km/h

Thinking path

Distance is 120 km.
Time is 2 hours.
So speed is 60 km/h.

Final answer: 60 km/h

Why this is fast: The direct formula works instantly when units are consistent.

Free now: first 10 questions Premium later: full solutions, advanced tricks, targeted practice

Q1 Medium

A cyclist covers 42 km in 2 hours 20 minutes. Find the average speed.