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Question

Speed of 90km/h when expressed in m/s is _____.


A

9000m/s

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B

90m/s

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C

25m/s

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D

20m/s

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Solution

The correct option is C

25m/s


Step 1: Given data
Speed =90km/h

Step 2: Converting the speed from km/h into m/s

We know that 1km=1000m and 1h=60×60s=3600s.

To convert km/h into m/s, simply put the values of kilometers in meters and the value of hours in seconds.

90km/h=90×1000m3600s90km/h=90×518m/s90km/h=25m/s

So, the speed of 90km/h when expressed in m/s is 25m/s.

Hence, the correct answer is option C.


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