Question

express the following speed in kilometre per hour 35 metre per second​

Answer 1

Answer:

At first convert metre into Km and second into minute and then minute into hour. We know that, 1000m=1Km. So, 1 metre=1/1000=10^-3 Km. Now, 60sec=1minute;1sec=1/60 minute. Again 60 minute=1 hour ; 1/60 minute = 1/(60*60)=1/3600 hour. Putting these values we get (35*10^-3)/(1/3600)=126 Km/h.

Answer 2

Answer:

126

Step-by-step explanation:

There ain't much you need to do.

There are certain conversion factors or contants that you either multiply or divide with while going from one system to other.

1m/s = 3.667km/h

Which makes it = 126 km/hr

It can be derived if you are interested which would be like

As 1000m = 1 km and m is in numerator so to cancel that divide you 35m/s with 1000m and finally multiply it with 3600 coz in 1 hour there are 3600s and seconds in your questions is in denominator so to cancel that multiply it.

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