1. The length and breadth of a rectangle are 12 cm and 5 cm respectively. What must be the length of its diagonal (in cm)?
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By: anil on 05 May 2019 02.04 am
Length of rectangle, $$l=12$$ cm and breadth, $$b=5$$ cm => Diagonal, $$d=sqrt{l^2+b^2}$$ => $$d=sqrt{(12)^2+(5)^2}$$ => $$d=sqrt{144+25}=sqrt{169}$$ => $$d=13$$ cm => Ans - (A)
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