Answer:
10 feet
Explanation:
base= x feet
height=(6+x) feet
area= (6+x)x=160
=6x+x²=160 ==> x²+6x-160=0
factories the eqn obtained....
(x-10)(x+16)=0
x= 10 or -16
since length cannot be negative, x=10
since the base = x feet
base=10 feet
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