A man riding his bicycle covers 150 m in 25 seconds. What is his speed in Km/hr
Answer & explanation
Correct answer: option 1
Speed = \(\frac{ Distance}{ Time}\)
Speed = \(\frac{150}{ 25}\) m/s
Speed in km/hr:
Speed = \(\frac{150}{ 25}\) x \(\frac{18}{5}\)
Speed =6 x \(\frac{18}{5}\)
Speed = \(\frac{108}{5}\)
Speed = 21.6 km/hr
*Note*
In order to convert km/hr to m/s - multiply by \(\frac{ 5}{ 18}\)
In order to convert m/s to kn/hr - multiply by \(\frac{ 18}{ 5}\)