1. If the ratio of two numbers is 1:5 and their product is 320, then the difference between the squares of these two numbers is
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By: anil on 05 May 2019 01.49 am
Let the two numbers be $$x$$ and $$5x$$ Product = $$(x) imes (5x)=320$$ => $$5x^2=320$$ => $$x^2=frac{320}{5}=64$$ $$ herefore$$ Difference between the squares of these two numbers = $$(5x)^2-(x)^2=25x^2-x^2=24x^2$$ = $$24 imes 64=1536$$ => Ans - (C)
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