Math, asked by itzJenifer, 10 months ago

hello frnds

answer this question which is given in the attachment​

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Answers

Answered by cjsreddy2005
1

Answer:

Step-by-step explanation:

2πr²=πrl

2r=l

now,

     l²=r²+h²

    4r²-r²=h²

3r²=81

r²=27,

now,

       total surface area = πr(l+r)

                                       =πrl+πr²

                                         =2πr²+πr²

                                           =3πr²

                                           =3×22/7  ×27

                                           =2002/7

                                            =286

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