Question

if the speed of a car is 50.4 km per hour find the distance covered in 3.6 hours

Answer 1

distance covered in 1 hour =50.4
distance covered in 3.6 hour =3.6×50.4=181.44

Answer 2

We know the formula ;

Speed = $\frac{Distance}{Time}$

But we have to convert the units ; km/h to m/s and 3.6 hours to seconds.

Therefore, 50.4 km/h = 14 m/s {

Formula ;  Divide the speed value by 3.6}

And 3.6 hours = 12960 seconds.

So, Putting these values in formula,

Speed = $\frac{Distance}{Time}$ ,

Distance = $Speed \times Time$

Distance = $14\times12960$

Distance = 181440 m

Therefore, Distance = 181440 m or 181.44 km

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Alternative Short method :

Distance = $\bold{Speed \times Time}$

Distance = $50.4km/h\times3.6h$

Distance = 181.44 km