Steve races to the nearest taco stand at lunchtime and sees that his pedometer recorded his peak speed at 71.7 cm/s. what was steve's peak speed in kilometers per hour?

Answer  and Explanation:

1 Km= 100 X 1000 cm

1 Hour= 60 X 60 = 3600 sec

With this in mind:

1 cm = 10-⁵ Km

1 sec = 0.00027777777 hour

Now:

speed=  71.7 cm/sec = 71.7 x 10-⁵ / 0-00027777777 km/hr =

2.5560 km/hour ⁻¹

the awnser is group 12