Mashaal Masha
The area $A$, in square centimeters, of a rectangular painting can be represented by the expression $w(w+29)$, where $w$ is the width, in centimeters, of the painting. Which expression represents the length, in centimeters, of the painting?
Difficulty: Medium
A: 

$w$

B: 

$29$

C: 

$(w+ 29)$

D: 

$w(w + 29)$

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