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The perimeter of a rectangle is 30 inches The length is seven inches more than the width What is the length?
Wiki User
∙ 15y ago
4 inches wide, 11 inches long.
11(length) -4(width) = 7
11*2 = 22 (2 long sides)
4*2 = 8 (2 short sides)
total sides = 30
this one is not too difficult to do in your head, but for similar problems you can use a system of equations.
x + 7 = y
2x +2y = 30
(x is width, y is length)
P=2(L+W)=7+W+W=7+2W
2W=30-7=23
W=23/2=11.5 SORRY INCORRECT WORKING OUT THE ABOVE IS CORRECT (sorry about the shouting)
Wiki User
∙ 15y ago
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