Area bounded by a straight line, one axis and two lines parallel to the other axis

1. A.
   $2$
2. B.
   $5$
3. C.
   $3$
4. D.
   $4$

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1. A.
   $6$
2. B.
   $\dfrac{15}{2}$
3. C.
   $\dfrac{17}{2}$
4. D.
   $10$

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1. A.
   $\dfrac{63}{2}$
2. B.
   $\dfrac{315}{2}$
3. C.
   $\dfrac{63}{5}$
4. D.
   $\dfrac{65}{2}$

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1. A.
   $10$
2. B.
   $12$
3. C.
   $30$
4. D.
   $15$

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