measurement

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a floor plan has a scale of 2cm : 3m
what is the actual length of a room measuring 30 cm on the floor plan?

I got to 20 is that correct?

  • measurement -

    Nope.

    How have you been taught to solve this kind of problem?

    I can show you two different ways.

  • measurement -

    i cant figure how to do this can you explain

  • measurement -

    is it 90
    i got
    2cm/ 3m = 30 cm/n
    = 2n = 3 (30)
    = n = 90

  • measurement -

    One way to do this is to set up a proportion or ration.

    2 cm is to 3 m as 30 cm is to ? m

    2/3 = 30/x

    Cross multiply and solve for x.

    2x = 90

    Divide both sides by 2.

    x = 45 m

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