Convert 12.5 m/s to km/h

Question

Solve in your head. What is 12.5 m/s in kilometres per hour? Aim: under 5 seconds.

Accepted Answer

Going from m/s to km/h reverses the factor: multiply by 3.6. 12.5 	imes 3.6 = 12.5 	imes 3 + 12.5 	imes 0.6 = 37.5 + 7.5 = 45 	ext{ km/h}. Takeaway. m/s to km/h is multiply by 3.6 (the reverse of dividing by 3.6). Splitting 3.6 into 3 + 0.6 keeps the multiply mental: triple the number, then add a fifth of it.

Convert 12.5 m/s to km/h

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