1.

A = (8, 3), B= (x, 3) and \(\overline{AB}\) = 12 units then x is A) 4 B) 14 C) 8 D) 20

Answer»

Correct option is (D) 20

Given that \(\overline{AB}\) = 12 units where A = (8, 3) and B = (x, 3)

\(\therefore\sqrt{(x-8)^2+(3-3)^2}=12\)        (By distance formula)

\(\Rightarrow(x-8)^2=12^2\)

\(\Rightarrow x-8=12\;or\;x-8=-12\)

\(\Rightarrow x=12+8=20\;or\;x=8-12=-4\)

Correct option is D) 20



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