A particle is moving from point A to point B and covers the entire distance of 10 km in just 2 minutes. What is the speed at which the particle is traveling?

5 m/s

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83.3 m/s

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83.3 km/s

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20 km/s

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Solution

The correct option is B 83.3 m/s
The formula to find speed when distance and time are given is,
Speed (m/s) = $\frac{D i s t a n c e (m)}{T i m e t a k e n (s)}$
To get the speed in metres per second, we have to first convert distance in metres and given time into seconds.
As we know, 1 km = 1000 metres and 1 minute = 60 seconds
Speed = $\frac{10000}{120}$ = $\frac{1000}{12}$ = 83.3 m/s

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