If d1 is the distance between the lines 3x+4y+5=0 and 6x+8y+20=0, and d2 is the distance between the lines 5x+12y+13=0 and 10x+24y+52=0, then d1d2 equals.
A
1
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B
2
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C
3
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D
4
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Solution
The correct option is A1 Consider the given equations of the lines.