A rectangle 14

A rectangle is 8 cm long and 5 cm wide. Its perimeter is doubled when each of its sides is increased by x cm. From an equation in x, find the new length of the rectangle.

Correct answer:

L =  14.5 cm

Step-by-step explanation:

a=8 cm b=5 cm  p=2 (a+b)=2 (8+5)=26 cm p2=2 p=2 26=52 cm  p2=2 (a+x)+2 (b+x) 52=2 (8+x)+2 (5+x)  4x=26  x=426=6.5  x=213=6.5  L=a+x=8+6.5=14.5 cm

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