As shown in the diagram, rectangle $ABCD$ is a metal sheet in which $CD =20\, cm$ and $BC =14 \,cm .$ From it, a semicircle with diameter $\overline{ BC }$ and a sector with centre $A$ and radius $AD$ is cut off. Find the area of the remaining sheet. (in $cm^2$)
As shown in the diagram, rectangle $ABCD$ is a metal sheet in which $CD =20\, cm$ and $BC =14 \,cm .$ From it, a semicircle with diameter $\overline{ BC }$ and a sector with centre $A$ and radius $AD$ is cut off. Find the area of the remaining sheet. (in $cm^2$)
- A
$34$
- B
$59$
- C
$49$
- D
$51$
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