1. If the length of one side and the diagonal of a rectangle are 5 cm and 13 cm respectively, then find its perimeter (in cm).





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  • By: anil on 05 May 2019 02.05 am
    Let the length of rectangle = $$l$$ cm and breadth, $$b=5$$ cm => Diagonal, $$d^2=l^2+b^2$$ => $$l^2=(13)^2-(5)^2$$ => $$l^2=169-25=144$$ => $$l=sqrt{144}=12$$ cm $$ herefore$$ Perimeter = $$2 imes(5+12)=2 imes17=34$$ cm => Ans - (B)
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