A problem by Angelo Forcadela

Level pending

The dimensions of a 12 cm by 15 cm picture are to be enlarged in the ratio 1:5/4. What is the area of the enlarged picture?

2225/4 1125/4 1225/4 2125/4

Angelo Forcadela by Angelo Forcadela , 31, Philippines

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1 solution

R e q u i r e d A r e a = 12 ∗ 15 ∗ { 5 4 } 2 = 180 ∗ 25 16 = 1125 4 Required~ Area~ = 12*15*\{\dfrac{5}{4}\}^2=180*\dfrac{25}{16} =\boxed{\dfrac{1125}{4}}

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Why do we need to square 5/4?

Analyn Calitina - 5 years, 4 months ago

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