hello frnds
answer this question which is given in the attachment
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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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