Question

The velocity of a car is 18m/s.Express this in km/h....plzzz help

Answer 1

multiply by 18/5 .. 64.8

Answer 2

$\textbf{\underline{\underline{According\:to\:the\:Question}}}$

→Velocity of car

= 18 m/s

$\tt{\rightarrow\dfrac{18\times 1m}{1s}}$

→As we know

→1000 m = 1km

$\tt{\rightarrow 1m =\dfrac{1}{1000}km}$

1h = 60 × 60 second

3600 second = 1 hour

→Therefore

→Velocity of car

$\tt{\rightarrow\dfrac{18\times 1m}{1s}}$

$\tt{\rightarrow\dfrac{18\times 1/1000km}{1/3600h}}$

$\tt{\rightarrow\dfrac{18\times 3600}{1000}km/h}$

= 64.8 km/hr

$\boxed{\begin{minipage}{9 cm} Additional Information \\ \\ \ Distance = Speed\times Time \\ \\ Displacement=Velocity\times time \\ \\ Average\; Speed = \dfrac{Initial\:\:Speed+Final\:\:Speed}{2} \end{minipage}}$