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Question

If a line parallel to 2x+6y7=0 makes an intercept of 10 units between the coordinate axes and y intercept is ±k, then the value of k is

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Solution

Given line : 2x+6y7=0
Line parallel to this is
2x+6y+λ=0
Line cuts xaxis at (λ2,0) and
y axis at (0,λ6)
Now, the intercept between the coordinate axes is
(λ2)2+(λ6)2=1040|λ|12=10|λ|=610λ=±610

Therefore, the y intercept
±k=±10k=10

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