The length of a rectangle is 5cm longer than its width. If the perimeter of the rectangle is 50 cm find the area

Question

referr to the question

Answer 1

Okay, so P = perimeter, and the problem says P = 50

 

Let's call x the width, and y is the length.

 

In the perimeter formula, 2X + 2Y = P

so 2X + 2Y = 50

 

 

The problem also tells us that that x = y+5, so now let's do some substituting and replace X with Y+5

 

2(y+5) + 2Y = 50

 

Solve.