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Grade: 12th pass

                        

9. A heap of wheat in the form of a cone whose diameter is 10.5 m and height is 3 m. Find iJ.s volume. The heap is to be covered by canvas to protect it from rain. Find the area of the canvas required.

9. A heap of wheat in the form of a cone whose diameter is 10.5 m and height is 3 m. Find iJ.s volume. The heap is to be covered by canvas to protect it from rain. Find the area of the canvas required.

one month ago

Answers : (1)

Pawan Prajapati
askIITians Faculty
5328 Points
							Diameter (d) = 10.6 m 
Height (h) = 3 m 

.radius 


(r) = 

10.5 


= 6.26 m 

Volume of t.he heap of wheat = .3!.vh 

= a1 )( 

22 )( 5.26 )( 5.25 )( 3 ms 

= 86.625 ms. 





SURFACE AREAS AND VOLUMES 203 

Slant height of the cone = (5.25)2 + ca>2 m 
= 27.5625 + 9 m 
= .J36.0025 m "" 6.05 m. 

Area of canvas required = x 5.25 x 6.05 m2 
= 99.825 m2• 


						
one month ago
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