Question

Help me with this!!! Fake answers will get reported

Answer 1

Explanation:

there is an obscure rule that looks like this

DB/AB = AB/CB

AB=40 for this problem

DB = x

CB = 20

then

X/40 = 40/20

X = 40(40/20)

X = 40(2)

X=80

I find that hard to believe too, :D

but the rule says that's right