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Answer:
253sq.m
Step-by-step explanation:
Hemispherical portion:
Radius r = total height -8
r=11.5-8=3.5cm
cylindrical portion:
height =8cm
radius =3.5=7/2cm
total surface area of cup=CSA of hemispherical portion +CSA of cylindrical portion.
2πr square +2πrh=2πr( r+h )
2x22/7x7/2 (7/2+8)
by solving u can get 253 sq.m
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Hii here is your answer
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