A rectangle has length xcm and width (x - 1)cm. If the pe...
A rectangle has length xcm and width (x - 1)cm. If the perimeter is 16cm. Find the value of x
312cm
4cm
412cm
5cm
Correct answer is C
l = x; b = x - 1
perimeter = 2(l + b) = 16
l + b = 162 = 8
l + b = 8
x + x - 1 = 8
2x = 8 + 1
2x = 9
x = 92cm
x = 412
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