The ratio between the perimeter and the breadth of a rectangle is 5: If the area of the rectangle is 216 sq.cm, what is the length of the rectangle?
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সঠিক উত্তর: Option B
216sq cm Sorry, your browser does not support inline SVG.
2x + 2y = 5y
2x=3y
x=3/2 y
again,
xy = 216
3/2 y * y =216
y2= 432/3 = 144
y=12cm
Length = 3/2 * 12 = 18cm