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Question

The parabola y2=4x and x2=4y divide the square region bounded by the lines x=4,y=4 and the coordinate axes. If S1,S2 and S3 are respectively the areas of these parts numbered from top-to-bottom, then S1:S2:S3 is

A
1:1:1
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B
2:1:2
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C
1:2:3
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D
1:2:1
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Solution

The correct option is A 1:1:1
S1=S3=40x24dx
=[x312]40=[64120]=163
Now, S2=40(4xx24)dx
=[2x3/223x312]40=163
S1:S2:S3=163:163:163=1:1:1
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