A vehicle moving at a steady pace requires 3 seconds more to cover 1 kilometer compared to the time it would take to cover the same distance at a speed of 80 kilometers per hour. What is the speed of the vehicle in kilometers per hour?

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Correct

77.5

78.5

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Official Explanation

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To find the speed of the vehicle, we first calculate the time it takes to travel 1 kilometer at 80 kilometers per hour. The time is given by the formula:

\text{Time} = \frac{\text{Distance}}{\text{Speed}} = \frac{1\text{ km}}{80\text{ km/h}} = 0.0125 \text{ hours} = 45 \text{ seconds}

Since the vehicle takes 3 seconds longer, the time taken by the vehicle is:

45 \text{seconds} + 3 \text{ seconds} = 48 \text{ seconds}

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Comments

MrinmoyJan 25, 2025

greatt question!

RiyaMay 22, 2024

Thankss

BhavyaFeb 2, 2025

thanksss

What this question tests

What it tests

Your application of distance = rate × time to trains, boats, and commuters, including relative speed.

Common trap

Mixing units (miles per hour vs. minutes) or averaging speeds — average speed is total distance over total time.