A running man crosses a bridge of length 500 meters in 4 minutes. At what speed he is running?
Answer & explanation
Correct answer: option 2
Speed = \(\frac{ Distance}{ Time}\)
Speed = \(\frac{500}{ 240}\) x \(\frac{18 }{ 5}\)
Speed = 7.5 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 \(\frac{ 18}{ 5}\)