The total surface area of a cone whose radius is r/2 and slant height 2
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TSA of cone=pi.r.l+pi.r^2=>22÷7×r÷2×2+22÷7×r÷2×r÷2=22÷7r+22÷7r÷4=22÷7r(1+1÷4)=22÷7×5÷4×r=3.92857r
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