Question

Which of the following is the fastest speed among the following?

• A. 2 m/s
• B. 2000 m/s
• C. 6 km/min
• D. 6 km/s

Answer 1

The correct option is D 6 km/s

Let's convert all the given unit in $m/\mathrm{s.}$

$~2m/s$

$~6km/min=\frac{6\times 1000m}{60s}=100m/s$

$~6km/s=\frac{6\times 1000m}{1s}=6000m/s$

$~2000m/s$

Therefore when we arrange in descending order,
6000 m/s > 2000 m/s > 100 m/s> 2 m/s

So the fastest speed among the given is 6000 m/s or 6 km/s.