Height 21 cm and slant height 28cm .find radius of cone
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Heya!
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Since,
(slant height) ^2 = (height) ^2 + (radius) ^2
=) (28)^2 = (21)^2 + r^2
=) 784 = 441 + r^2
=) 784 - 441 = r^2
=) 343 = r^2
=) (7√3) ^2 = r^2
=) 7√3 cm = r
Hence radius is 7√3 cm.
Hope it helps uh :)
------------------------------
Since,
(slant height) ^2 = (height) ^2 + (radius) ^2
=) (28)^2 = (21)^2 + r^2
=) 784 = 441 + r^2
=) 784 - 441 = r^2
=) 343 = r^2
=) (7√3) ^2 = r^2
=) 7√3 cm = r
Hence radius is 7√3 cm.
Hope it helps uh :)
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