10. A tent is in the shape of a right circular cylinder up to a height of 3 m
and conical above it. The total height of the tent is 13.5 m and the radius
of its base is 14 m. Find the cost of cloth required to make the tent at the
rate of 80 per square metre. (Take n = 22/7)
Answers
Answer:
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so long question
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too
Answer:
CSA of cylinder =2πrh
\begin{gathered}2 \times \frac{22}{7} \times 14 \times 3 \\ = 264 {m}^{2}\end{gathered}
2×
7
22
×14×3
=264m
2
radius=14m
height =13.5-3=10.5
l {}^{2} = r {}^{2} + h {}^{2}l
2
=r
2
+h
2
\begin{gathered}14 { }^{2} + 10.5 { }^{2} \\ 196 + 110.25 \\ = 306.25 \\ l \sqrt{306.25 } \\ l = 17.5m\end{gathered}
14
2
+10.5
2
196+110.25
=306.25
l
306.25
l=17.5m
CSA of cone =πrl
\begin{gathered}\frac{22}{7} \times 14 \times 17.5 \\ = 770 {m}^{2}\end{gathered}
7
22
×14×17.5
=770m
2
total area=264+770
1034 {m}^{2}1034m
2
cost of cloth per square m = Rs80
cost of cloth
1034 {m}^{2}1034m
2
\begin{gathered}80 \times 1034 \\ = 82720\end{gathered}
80×1034
=82720