Distances Jokes

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    Measurement and signs in Puerto Rico

    Having just returned from a brief visit to Puerto Rico, I must report how well the mixed english/metric system has made live easier on the island.
    All speed limits are posted in Miles Per Hour
    All distances on the highway are posted in Kilometers
    (however short distances are posted in feet & inches)
    Therefore it is normal to see the following three signs next to each other:
    SPEED
    LIMIT55
    MPH
    PONCE
    55 KMSAN JUAN
    285 KM
    MAXIMUM
    CLEARANCE
    12'6"
    Just think how this must translate to one of the old common math problems assigned in school:
    Train A (comprised of an engine, 22 box cars and a caboose) leaves San Juan at 12 noon south-bound for Ponce.
    Train B (comprised of an engine, 16 box cars and a caboose) leaves Ponce 15 minutes later north-bound for San Juan.
    There is only one stretch of double track where the trains may pass safely. This starts 100KM south of San Juan and is 2.5KM long.
    It is 230KM from San Juan more...

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