Mars travels around the sun at a speed of approximately 15 miles per second. The approximate speed is how many miles per hour?  Choose the correct choice from the following choices
A) 48,000 B) 51,000 C) 54,000 D) 57,000 E) 60,000
15 * 3600 = 54,000   The answer is 54,000.
<result>C</result>
Mars travels around the sun at a speed of approximately 15 miles per second. The approximate speed is how many miles per hour?