Correct Answer: Option D

Explanation

Average speed = \(\frac{Distance}{Time}\)

\(\frac{400km}{hr} = \frac{60km}{Time}\)

Time = \(\frac{60km}{400 km/hr}\)

= \(\frac{60hr}{400}\)

M = \(\frac{60hr}{400} \times \frac{60min}{1hr}\)

= 9 minutes

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