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Question
The cross-section of a road partly in banking and partly in cutting is shown in the given figure. The area of the shaded portion is
Options:
A .  ⅓ × (b - rd)²/(r - s)
B .  ⅓ × (b - rd)²/(r + s)
C .  ½ × (b + rd)²/(r - s)
D .  ⅓ × (b - rd)²/(s - r)
Answer: Option A

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