Find the total surface area of a cone, i...

Find the total surface area of a cone, if its slant height is 21 m and diameter of its baseis 24 m.

Verified by Experts

TSA=CSA+BA
=`pirl+pir^2`
=`pir(l+r)`
=`22/7*12(21+12)`
=`1244.7 m^2`

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