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The perimeter of a rectangle is 90 in. The length is 3 more than the width. What is the length? |
Answer» GivenPerimeter of Rectangle is 90 units . LENGTH is 3 more than the WIDTH. To Findwe have to find the length Since, perimeter of Rectangle is given and we don't know the length and breadth.So,let us assume the length and breadth some Variable. Let the breadth be 'x' Length is 3 more than the width : Then our Equation BECOMES :3+x Perimeter of Rectangle= 2(l+b) Where ,l is the length and b is the breadth => Perimeter of Rectangle= 2(3+x+x) => 90= 2(2x+3) =>90= 4x+6 => 84= 4x => x= 84÷4 x= 21Hence, breadth is 21 units length = 3+x= 3+21= 24 units Check:Perimeter of Rectangle= 2(24+21) Perimeter of Rectangle=2(45)=90 units. Extra information=>Perimeter is the TOTAL distance occupy by a solid 2D figure around its edge. Some properties of Rectangle:
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