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MATH / In trapezoid ABCD, (AB)¯ is parallel to (CD)¯, AB=7 units, and CD=10 units. Segment EF is drawn parallel to (AB)¯ with E lying on (AD)¯ and F lying on (BC)¯. If BF:FC=3:4, what is …

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problem

In trapezoid ABCDABCD, AB¯\overline{AB} is parallel to CD¯\overline{CD}, AB=7AB = 7 units, and CD=10CD = 10 units. Segment EFEF is drawn parallel to AB¯\overline{AB} with EE lying on AD¯\overline{AD} and FF lying on BC¯\overline{BC}. If BF:FC=3:4BF:FC = 3:4, what is EFEF? Express your answer as a common fraction.
Plain-text mathematical notation (without MathML)
In trapezoid ABCD, (AB)¯ is parallel to (CD)¯, AB=7 units, and CD=10 units. Segment EF is drawn parallel to (AB)¯ with E lying on (AD)¯ and F lying on (BC)¯. If BF:FC=3:4, what is EF? Express your answer as a common fraction.
Original LaTeX notation
In trapezoid $ABCD$, $\overline{AB}$ is parallel to $\overline{CD}$, $AB = 7$ units, and $CD = 10$ units. Segment $EF$ is drawn parallel to $\overline{AB}$ with $E$ lying on $\overline{AD}$ and $F$ lying on $\overline{BC}$. If $BF:FC = 3:4$, what is $EF$? Express your answer as a common fraction.

level

Level 5

type

Geometry

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