Q. 65.0( 2 Votes )

In the given figu

Answer :

Given: DE BC

AD = x cm


DB = (3x + 4) cm


AE = (x + 3) cm


EC = (3x + 19) cm


To find: x


DE BC


By Basic Proportionality theorem, we have



x (3x + 19) = (x + 3) (3x + 4)


3x2 + 19x = 3x2 + 13x + 12


19x – 13x = 3x2 + 12 – 3x2


6x = 12 or x = 2


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