13 Fig. 13.1 shows a greenhouse which is built against a wall.
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{97ed9d1d-b9e5-47d6-a451-b14757c0e19d-4_606_828_347_358}
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\caption{Fig. 13.1}
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\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{97ed9d1d-b9e5-47d6-a451-b14757c0e19d-4_401_350_529_1430}
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\caption{Fig. 13.2}
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The greenhouse is a prism of length 5.5 m . The curve AC is an arc of a circle with centre B and radius 2.1 m , as shown in Fig. 13.2. The sector angle ABC is 1.8 radians and ABD is a straight line. The curved surface of the greenhouse is covered in polythene.
- Find the length of the arc AC and hence find the area of polythene required for the curved surface of the greenhouse.
- Calculate the length BD .
- Calculate the volume of the greenhouse.