The length of one side and the diagonal of a rectangle are 20 cm and 29 cm respectively. Find the length of its other side (in cm).
Let the length of rectangle = $$l$$ cm and breadth, $$b=20$$ cm
=> Diagonal, $$d^2=l^2+b^2$$
=> $$l^2=(29)^2-(20)^2$$
=> $$l^2=841-400=441$$
=> $$l=\sqrt{441}=21$$
$$\therefore$$ Length of its other side = 21 cm
=> Ans - (C)
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