Find the total surface area of a cone if it's slant height is 21m and diameter of it's base is 24m
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we have radius of the cone=½*24=12m
and itz slant height l= 21m
total surface area of cone = πr(l+r)m²
=22/7*12*(21+12)
=22/7*12*33
=1244.57m²(approx)
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