1.

4. The perimeter of rectangle is 140 cm. If the sidesare in the ratio 3 : 4, find the lengths of the foursides and the two diagonals.

Answer»

let the sides are 3x and 4x

perimeter = 2(3x+4x) = 140 => 14x = 140=> x = 10

so, length = 4*10=40cm and breadth = 3*10 = 30cm

also, Diagonal = √40²+30² = 50cm



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