The sides of a rectangle and are
in the ratio 4.5 and its perimeter is 90 cm. Find the dimensions of the rectangle and its area.
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Answer:
let the sides be 4x and 5x
perimeter of the rectangle is given = 90cm
perimeter = 2( L+ B)
90=2(4x+ 5x )
90/2 = 9x
45 = 9x
45/9 =x
5 = x
4x = 4 × 5 =20cm
5x = 5 ×5= 25 cm
area of the rectangle = L× B
= 20 × 25
=500cm^2is the area of the rectangle.
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