Question

if a pair of liner equations x+2y=3 and 2x+4y=k are coincident then the value of k is
A 3
B 6
C -3
D -6​

Answer 1

Answer:

option A is correct

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Answer 2

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OPTION B

Step by Step

$a_1 = 1, b_1 = 2, c_1 = 3, a_2 = 2, b_2 = 4, c_2 = k$

So, as the question gives us the 3rd case, we compare the ratios so as to find the value of k.

$\begin{gathered} :\implies \dfrac{a_1}{a_2} = \dfrac{b_1}{b_2} = \dfrac{c_1}{c_2} \\\\:\implies \dfrac{1}{2} = \dfrac{2}{4} = \dfrac{3}{k} \\\\:\implies k = 3*2 \\\\\bf{:\implies k = 6}\end{gathered}$