Math conversion

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If one meter is equal to 39.4 inches, how many centimeters are in one foot?
Answer 30.4 cm
How is this answer obtained?

i know there is 12 in in a foot
and 100 centimeters in a meter.
what happens next?

  • Math conversion -

    1ft*12in/ft*100cm/39.4in= xxx cm

  • Math conversion -

    I still don't get it.

  • Math conversion -

    I know!

  • Math conversion -

    (1 m/39.4 in)(12 in / 1 ft)(100 cm/m)

    = 30.46 cm / ft

  • Math conversion -

    because
    (m/in)(in/ft)(cm/m) = cm/ft

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