Time, Speed & Distance – Notes, Rules & Examples

Units to races — 11 concepts covering relative speed, trains, boats and circular tracks with rules, examples and common mistakes.

Quantitative Aptitude11 conceptsEnglish + हिंदी116 practice questions

Concept 1 · free preview

Distance = Speed × Time

Understand

The whole chapter rests on one relation: distance = speed × time. Every other formula comes from it.

Distance = Speed × Time

Speed = Distance ÷ Time

Time = Distance ÷ Speed

Example

150 km in 2 hours 30 minutes → 150 ÷ 2.5 = 60 km/h. 45 km at 30 km/h → 45 ÷ 30 = 1.5 hours = 1 hour 30 minutes.

Common mistake

Writing 2 hours 30 minutes as 2.30 hours is wrong. 30 minutes = 30/60 = 0.5 hour, so it is 2.5 hours.

Check yourself

How far do you travel in 45 minutes at 48 km/h?

10 more concepts in this note

Converting units: km/h ↔ m/s
Ratios of speed and time
Average speed and stoppages
Arriving late or early
Relative speed: meeting and chasing
Trains: passing a pole or a platform
Two trains, or a moving person
Boats and streams
Circular track
Races: beat, head start, dead heat

Time, Speed & Distance in your exam syllabus

These exams' official syllabus includes this chapter.

FAQs

What do the Time, Speed & Distance notes cover?

11 concepts: Distance = Speed × Time, Converting units: km/h ↔ m/s, Ratios of speed and time, Average speed and stoppages, Arriving late or early, Relative speed: meeting and chasing and more. Each concept has an explanation, rules, solved examples and common mistakes.

Are these notes available in Hindi?

Yes. Every concept is available in English and हिंदी; switch the language at the top of the note.

Are the notes free?

The first concept is free to read here. The full notes, practice questions and mock tests are part of PYQsathi Pro (₹299 per year); when a launch offer is running, its coupon is shown above and applied after you sign in. Question paper downloads are always free.

PYQSathi is an independent platform, not a government website. Notes are written for exam practice; always confirm facts that change (rates, schemes, dates) in the latest official notice.