Question

A car moves at the speed of 54 km/hr what is the speed of the car in metres per second

Answer 1

Answer: 15 m/s

Step-by-step explanation:

Speed of the car - 54 km/hr

To convert km/hr in m/s multiply by 5/18

54 x 5/18 = 270/18

270/18 in simplest form is 15 m/s

So, the answer is 15 m/s

Answer 2

The speed of the car in meters per second is 15 meter/second

Given :

A car moves at the speed of 54 km/hr

To find :

The speed of the car in meters per second

Solution :

Step 1 of 2 :

Write down the speed of the car

Here it is given that the car moves at the speed of 54 km/hr

Step 2 of 2 :

Express speed in meters per second

We know that ,

1 km = 1000 meter

∴ 54 km = 54000 meter

Also , 1 hour = 3600 seconds

Thus we get

$\displaystyle \sf{ 54 \: \: km/hr }$

$\displaystyle \sf{ = \frac{54000}{3600} } \: \: meter/second$

$\displaystyle \sf{ = \frac{540}{36} } \: \: meter/second$

$\displaystyle \sf{ = 15} \: \: meter/second$

Hence speed of the car in meters per second is 15 meter/second

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