1.

The perimeter of a rectangle is 90 in. The length is 3 more than the width. What is the length?

Answer»

Given

Perimeter of Rectangle is 90 units .

LENGTH is 3 more than the WIDTH.

To Find

we have to find the length

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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= 21

Hence, 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:

  • Opposite sides are EQUAL and parallel
  • Both Diagonals bisects each other and are equal in length.
  • The sum of all Interior angles is 360°.


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