a rectangular is 10cm long and 8cm wide .when each side of rectangular is increased by x cm its perimeter is doubled .find the equation in x and hence find the area of the new rectangular
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perimeter =2(l+b)
= 36cm
increased perimeter = 2(18+2x)
72 = 36 +4x
x = 9cm
increased area = 19×17
= 323 cm²
= 36cm
increased perimeter = 2(18+2x)
72 = 36 +4x
x = 9cm
increased area = 19×17
= 323 cm²
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