Superman flies at a heroic rate of 10 miles per second- wow! What is his speed in kilometers per hour? [1km = 0.6 miles]
Choices.
A) 1,000 B) 12,000 C) 60,000 D) 30,000 E) 120,000
To calculate the equivalent of kilometres in a mile   10 miles = 10*(0.6)^-1 = 16.6667 kilometres   In 1 hour there are 60 minutes   In 1 minute there are 60 seconds   So in 1 hour there are 3600 seconds   Speed in kmph = 16.6667 * 3600 = 60000   60,000orrect answer - 60,000
<result>C</result>
Superman flies at a heroic rate of 10 miles per second- wow! What is his speed in kilometers per hour? [1km = 0.6 miles]