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Q.

The speed of a moving car is 72 km/h. calculate its speed in m/s.


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a

20 m/s

b

18 m/s

c

30 m/s

d

None of these 

answer is A.

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Detailed Solution

Concept- A automobile traveling at 72 km/h is provided as the answer to the inquiry.
Please determine the vehicle's m/s speed.
Knowing that 1000 meters equals one kilometer.
Hence, to convert kilometers into meters we need to multiply the value in kilometers with 1000.
We also know that 1 hour is 60 minutes and 60 minutes is  60×60=3600sec60×60=3600sec  .
Hence, to convert hour to meter we need to multiply the value in hour with 3600.
Therefore,
To convert km/h into m/s we need to multiply the value in km/h with  10003600
Thus,
In this instance, the car's speed is 72 km/h.
Therefore,
To calculate the speed in m/s we need to multiply 72 km/h with with  10003600
i.e 72 km/hr = 72 ×10003600
⇒72km/h=20m/s  
As a result, the vehicle's speed in m/s. 20 m/s  .
Hence, the correct option is 1.
 
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