A boy is running at a speed of p kmph to cover a distance of 1 km. But, due to the slippery ground, his speed is reduced by q kmph (p > q). If he takes r hours to cover the distance, then:

A. $$\frac{1}{r} = p - q$$

B. $$r = p - q$$

C. $$\frac{1}{r} = p + q$$

D. $$r = p + r$$

Answer: Option A

Solution(By Examveda Team)

$${\text{Speed }} = \frac{{{\text{Distance }}}}{{{\text{Time}}}}$$    or
$$\frac{{{\text{Distance }}}}{{{\text{Time}}}} = {\text{Speed}}$$
⇒ $$\frac{1}{r} = p - q$$