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# The Circumference of the Base of a 10 M Height Conical Tent is 44 Metres. Calculate the Length Of Canvas Used in Making the Tent If Width of Canvas is 2 M. (Use It 𝜋= 22/7). - CBSE Class 9 - Mathematics

ConceptSurface Area of a Right Circular Cone

#### Question

The circumference of the base of a 10 m height conical tent is 44 metres. Calculate the length of canvas used in making the tent if width of canvas is 2 m. (Use it 𝜋= 22/7).

#### Solution

WKT, CSA of cone = pirl

Given circumference=2pir

⇒ 2xx22/7xxr=44⇒ r/7=1⇒ r=7m

∴ L= sqrt(r^2+h^2)=sqrt(7^2+10^2)=sqrt149m

∴ CSA  of  tent=pirl=22/7xxsqrt149=22sqrt149

∴ The length of can vas used in making tent

="Area of canvas"/"width of canvas"

22sqrt149/2=11sqrt49

= 134.2m

Is there an error in this question or solution?

#### APPEARS IN

RD Sharma Solution for Mathematics for Class 9 by R D Sharma (2018-19 Session) (2018 to Current)
Chapter 20: Surface Areas and Volume of A Right Circular Cone
Ex.20.10 | Q: 22 | Page no. 8
Solution The Circumference of the Base of a 10 M Height Conical Tent is 44 Metres. Calculate the Length Of Canvas Used in Making the Tent If Width of Canvas is 2 M. (Use It 𝜋= 22/7). Concept: Surface Area of a Right Circular Cone.
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