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Let the straight line x = b divide the a...

Let the straight line x = b divide the area enclosed by `y = (1-x)^(2), y = 0` and `x = 0` into two parts `R_(1) (0 le x le b)` and `R_(2) (b le x le 1)` such that `R_(1) - R_(2) = 1/4`. Then b equals

A

`3/4`

B

`1/2`

C

`1/3`

D

`1/4`

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The correct Answer is:
B
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