Question

Without any stoppage a person travels a certain distance at an average speed of $42 \mathrm{~km} / \mathrm{hr}$ and with stoppages he covers the same distance at an average speed of $28 \mathrm{~km} / \mathrm{hr}$. How many minutes per hour does he stop? (a) 25 minutes (b) 30 minutes (c) 20 minutes (d) None of these

Name: Problem 26, Chapter 15: The Pearson Guide to Objective Arithmetic for Competitive Examinations
Uploaded: 2021-09-27T12:52:04-08:00
Duration: 2 min 26 s
Channel: Ahmad Reda
Description: Without any stoppage a person travels a certain distance at an average speed of 42 km / hr and with stoppages he covers the same distance at an average speed of 28 km / hr. How many minutes per hour does he stop? (a) 25 minutes (b) 30 minutes (c) 20 minutes (d) None of these

   Without any stoppage a person travels a certain distance at an average speed of $42 \mathrm{~km} / \mathrm{hr}$ and with stoppages he covers the same distance at an average speed of $28 \mathrm{~km} / \mathrm{hr}$. How many minutes per hour does he stop?
(a) 25 minutes
(b) 30 minutes
(c) 20 minutes
(d) None of these

The Pearson Guide to Objective Arithmetic for Competitive Examinations

Dinesh Khattar 2nd Edition

Chapter 15, Problem 26

Instant Answer

Solved by Expert Ahmad Reda

09/27/2021

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Step 1: Let the distance traveled be $ D $ kilometers. Show more…

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Without any stoppage a person travels a certain distance at an average speed of $42 \mathrm{~km} / \mathrm{hr}$ and with stoppages he covers the same distance at an average speed of $28 \mathrm{~km} / \mathrm{hr}$. How many minutes per hour does he stop? (a) 25 minutes (b) 30 minutes (c) 20 minutes (d) None of these

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Key Concepts

Average Speed

Average speed is the total distance traveled divided by the total time taken, including any stoppages. It is a fundamental concept in motion, helping to compare different speeds under varying conditions and assess the overall efficiency of travel.

Effect of Stoppages on Motion

This concept involves the analysis of how interruptions or stoppages reduce the effective moving time and consequently lower the overall average speed. It is crucial in understanding real-world scenarios where a vehicle or person is not moving continuously.

Time-Distance Relationship

The time-distance relationship connects the distance traveled with the time taken at a given speed. By employing this concept, one can calculate the time saved or lost due to continuous movement versus intermittent stops, facilitating deeper insights into travel efficiency.

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