Question 131955
Superman takes off after Lex Luthor, who is 125 miles away. Flying to capture Lex takes superman 210 seconds with the tailwind. The return trip takes 215 seconds. How fast is Superman? What is his speed? Convert to miles per hour to the nearest whole number. 
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To Lex DATA:
Distance = 125 miles ; Time = 210/3600 hr. ; Rate = d/t= 125*3600/210 = 2142.86 mph
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From Lex DATA:
Distance = 125 miles ; Time = 215/3600 hr; Rate = d/t = 125*3600/215 = 2093.023
mph
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