Question

Change the speed of 6 metre per second into kilometre per hour.​

Answer 1

Explanation:

6m/s into km/h

1st method

We know

1km = 1000m or 1m = 0.001km

1hour = 60 min and 1min = 60 sec

Now 1hour = 60×60 = 3600sec

or 1sec = 1/3600hour

To convert

(i)6m into km

Divide 6 by 1000 we get 0.006km

(ii)sec into hour

Divide 1 by 3600 we get 0.00028hour

For km/hour

0.006/0.00028 = 21.4285714 km/hr

Or

2nd method

6m/s into km/hr

(6/1000)km/(1/3600)hr

= 0.006×3600

= 21.6km/hr