A field in the shape of a right triangle (with the two shortest sides measuring 60 feet and 80 feet) has roads on all three sides that don't drain properly. As a result, muddy water puddles collect and when the cars pass through, they splash all the snow that is within 5 feet of any one of the three roads.

If all other snow not splashed by cars is kept clean, what percent is clean?

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once you see that new triangle's sides are reduced by ratio 3/4, the area  is reduced to (3/4)^2 of the original  i.e.    56.25% .........

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Posted by Ady TZIDON on 2005-05-15 20:03:39