A person has to cover a distance of 90 k

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Target Exam

CUET

Subject

General Test

Chapter

Numerical Ability

Topic

Time, Speed and Distance

Question:

A person has to cover a distance of 90 km. If he increases his speed by 6 km/hr he reaches 4 hour early. Find his initial speed (in km/hr).

Options:

Correct Answer:

Explanation:

Let the initial speed = x km/hr

ATQ,

\(\frac{90}{x}-\frac{90}{x+6}=4\)

let x = 9 (by using option)

\(\frac{90}{9}-\frac{90 }{15}=4\)

10 – 6 = 4 (satisfied)

so, x = 9