If an object travels 400 feet in 4 seconds, what is the object's approximate speed in miles per hour? (Note: 1 mile = 5280 feet) Answers:  A) 68  B) 54  C) 87  D) 96  E) 15
1 mile = 5280 feet   =&gt; 1 feet = 1/5280 miles   If the object travels 400 feet in 4 sec   then it travels 400/4 * 60 * 60 feet in 1 hour (1 hr = 60 min * 60 sec)   = 3600 * 100 feet in 1 hour   = 360000 feet in 1 hr   = 360000/5280 miles in 1 hour   = 36000/528 miles/hr ~ 68 miles/hr   68nswer - 68
<result>A</result>
If an object travels 400 feet in 4 seconds, what is the object's approximate speed in miles per hour? (Note: 1 mile = 5280 feet)