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Question

Find the volume of a cone having radius of the base 35 cm and slant height 37 cm.


Solution

Radius of the base of the cone, r = 35 cm
Slant height of the cone, l = 37 cm

Now, h=l2-r2   =372-352    =1369-1225    =144    =12 cm

∴ Volume of the cone = 13πr2h 
                                 =13×227×352×12=22×5×35×4=15400 cm3

Mathematics
RS Aggarwal (2017)
Standard IX

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