Question

l=500m , t=90s then what's the speed in km/h ?

Answer 1

$\text{\underline{1 km = 1000 m}}$

$\text{\underline{1 hr = 3600 sec}}$

Distance = 500 m = $\dfrac{500}{1000}$ km

Distance = 0.5 km

Time = 90 s = $\dfrac{90}{3600}$ hour

Time = 0.025 hour

Speed = Distance / Time

Speed = $\dfrac{0.5}{0.025}$ = 25

$<b>Speed = 20 km/h</b>$