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Question 21
The length and breadth of a rectangle are 12 cm and 5 cm respectively. What must be the length of its diagonal (in cm)?
Solution
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 -Â (A)
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