1. The length of the diagonal and the breadth of a rectangle are 25 cm and 7 cm respectively. Find its perimeter (in cm).
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By: anil on 05 May 2019 02.07 am
Let length of rectangle = $$l$$ cm and breadth = $$7$$ cm Also, diagonal = $$d=25$$ cm => $$l^2=d^2-b^2$$ => $$l=sqrt{(25)^2-(7)^2}$$ => $$l=sqrt{625-49}=sqrt{576}$$ => $$l=24$$ cm $$ herefore$$ Perimeter = $$2(l+b)$$ = $$2 imes(24+7)=62$$ cm => Ans - (D)
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