The answer is: " 3.6 mi / h " ; or, write as: " 3 ⅗ mi / h " .
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Explanation:
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1 mile per 50 min. ; or, 1 mi./50 min. ;
→ Convert to "mi. per hr." or, "mi./ h"
(also abbreviated "mph" ; but let's use "mi/h" to avoid confusion.
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Note: The exact conversion: 60 min. = 1 h .
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(1 mi / 50 min) * (60 min / 1 hr) = (60/50) mi/h ;
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= 6/5 mi/h ;
______________________________________________________ = " 3.6 mi / h " ; or, write as: " 3 ⅗ mi / h ".
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