The perimeter of a rectangle is 150 cm.the length is 15 cm. greater than the width .find the width.?

Question

The perimeter of a rectangle is 150 cm.the length is 15 cm. greater than the width .find the width.?

Answer 1

The perimeter is length + width + opposite length + opposite width, or in other words: 150 = 2L + 2W

Also L = W + 15

So, 150 = 2(W + 15) + 2W = 4W + 30

This means, 4W = 120 or W = 30

Therefore: L = 30 + 15 = 45

Answer 2

So you know that the perimeter is the sum of the sides.  So...

150 = x + (x+15) + x + (x + 15)

Simplify... 150 = 4x + 30

Solve for x... 120 = 4x so x = 30

Width = 30 and Length = 30 + 15 = 45

Answer 3

30cm

idiot