Hi,

divided into 2 sections. one section is 2/5 of the other

Let x  and (2/5)x represent the 2 sections

x + (2/5)x = 42ft

Mutilpying thru with 5 to clear the demoninator

5x + 2x = 5*42ft

7x = 210fy

x = 30ft

Other sections is (2/5)30 = 12ft

checking our answer

30ft + 12ft = 42ft 

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