Question

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

• A. 5 m/s
• B. 83.3 m/s
• C. 83.3 km/s
• D. 20 km/s

Answer 1

The correct option is B

83.3 m/s

The formula to find speed when distance and time are given is,
Speed (m/s) = $\frac{Distance\left(m\right)}{Timetaken\left(s\right)}$
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