Question

find TSA of a cone if its slant height is 21 m and diameter equal 24 metre

Answer 1

Here,

l( slant height)=21m

Diameter( 2r)=24m

So radius( r)=24/2=12m

Now,

TSA of cone = pi r (l+r)

=> 12pi(21+12)

=> 12pi×33

=>1244.57m2

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Answer 2

I hope this will help you..