Question 17775
area=154 sp feet=1/2bh
h=b+8
then area becomes:
154=b(b+8)/2
154*2=b(b+8)
308=b^2+8b
b^2+8b-308=0
(b-14)(b+22)=0
b=14,-22
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length of base cannot be negative
hence b=14 feet
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Hope this helps,
Prabhat