A man covers half of his journey at 6 km/ hr and the remaining half at 3 km/ hr. His average speed is-

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RRB ASSISTANT LOCO PILOT (Patna) 2013 click here to view all questions

A man covers half of his journey at 6 km/ hr and the remaining half at 3 km/ hr. His average speed is-

A4 km/ hr

B4.5 km/ hr

C9 km/ hr

D3 km/ hr

rakul ? Jan 15 '2020 at 11:6

Correct answer is: 4 km/ hr

Explanation:

\(\text {Average speed =}\frac{2xy}{x+y}\)

\(= \frac{2 \times 6 \times 3}{ 6+3}\)

\(= \frac{36}{9}\)

\(=4 \text{ kmph}\)

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Correct answer is: 4 km/ hr Explanation: \(\text {Average speed =}\frac{2xy}{x+y}\) \(= \frac{2 \times 6 \times 3}{ 6+3}\) \(= \frac{36}{9}\) \(=4 \text{ kmph}\) rakul ? answered Jan 15 '2020 at 11:6 All Comments

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