Question

Which of the following relations is correct? (Speed: S, Distance: D, Time: T)

• A. S = D / T
• B. S = T / D
• C. S = 1 / TD
• D. S = DT

Answer 1

The correct option is A S = D / T

Speed is defined as the distance covered by an object in unit time.
Hence, $Speed\left(S\right)=\frac{Distance\left(D\right)}{Time\left(T\right)}$
The commonly used units of speed are $m{s}^{-1}$ and $km{h}^{-1}$