A car moves at a speed of $54 k m / h r$ . What is the speed of the car in metres per second?

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Solution

Converting the speed of the car from $k m / h r$ to $m / s$ (metres per second)
We know that, $1 k m / h r = \frac{5}{18} m / s$
$\Rightarrow 54 k m / h r = 54 \times \frac{5}{18} m / s$
$\Rightarrow 54 \times \frac{5}{18} = 3 \times 5 = 15 m / s$
Hence, the speed of the car in metres per second is $15 m / s$ .

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A car moves at a speed of 54km/hr. What is the speed of the car in metres per second?

Converting the speed of the car from km/hr to m/s (metres per second)We know that, 1km/hr=518m/s⇒54km/hr=54×518m/s⇒54×518=3×5=15m/sHence, the speed of the car in metres per second is 15m/s.

A car moves at a speed of $54 k m / h r$ . What is the speed of the car in metres per second?