A boy is running at a speed of p km/h to cover a distance of 1 km but due to slippery ground his speed is reduced by q km/h (p > q). If he takes r hours to cover the distance, which of the following condition is true:
Answer & explanation
Correct answer: option 1
Resultant Speed = p-q km/hr
distance = 1 km
Time = r hours
r = 1/(p-q)
p-q = 1/r
The correct answer is Option (1) → $\frac{1}{r}= (p-q)$