lets the tree increase x feet every year..so at the end of 6 years the height will be 4+6x
so, 4 +6x = 6/5*( 4+ 4x) => x=2/3
6/5 becasue it is 1/5th taller
i dont understand where u came up with the equation 6/5(4+4x) would you please explain/?
(tree height @end of 4th year ) (1+1/5) = (tree height@ end of 6th year)
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