A person has to cover a distance of 96 km. If he increases his speed by 4 km/hr he reaches 4 hour early. Find his initial speed (in km/hr).
Answer & explanation
Correct answer: option 3
Let the initial speed = x km/hr
ATQ,
\(\frac{96}{x}-\frac{96}{x+4}=4\)
let x = 8 (by using option)
\(\frac{96}{8}-\frac{96 }{12}=4\)
12 – 8 = 4 (satisfied)
so, x = 8