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14 April, 11:52

A model airplane is built with a wing span of 18 inches the actual wing span of the airplane is 90 feet find the scale

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  1. 14 April, 12:08
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    First, convert the 90 feet of the real plane to inches so that you can find the scale:

    90 x 12 = 1080

    Now, divide the inches of the real wing span by the inches of the model wing span:

    1080/18

    Now you want to simplify. The easiest way to start is dividing the top and bottom by 2:

    540/9

    Now try dividing the top and bottom by 9:

    60/1

    So your scale is 1 inch of model airplane to 60 inches of actual airplane.
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