Mail train

The speed of the mail train is 1370 meters per minute. Express it in miles per hour, correct to three significant figures. Use the following facts to convert this units: 1 meter = 39.37 inches, 1 mile = 1609 m, 1 hour = 60 minutes

Correct answer:

v =  51.0876 mph

Step-by-step explanation:

s1=1370 m s=s1/1609=1370/16090.8515 mi t=1 min h=1:60  h=0.01667 h  v=s/t=0.8515/0.0167=51.0876 mph

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