ex1 surface area?????
Answers
Step-by-step explanation:
- TSA = Lsa of cone +CSA of Hemis
sphere
= πrl + 2πr 2
r = 1.75, h=5-1.75=3.25
I=Vh 2+ r2
I=v3.25^2+1.75^2 =v13.6250 = 3.7cm
TSA = 22/7x1.75x3.7+2x22/7x1.75^2
= 20.25+I9.25=39.5cm2
= 20.3315+19.2325=39.5cm2
Answer:
total surface area of Hemisphere =2/3×pai×r²
=2/3×22/7×3.5×3.5
=2/3×22×0.5×3.5
=44/3×1.75
=77/3
=25.7
diameter of hemisphere =3.5
radius =3.5/2
=1.75
hight of cone= radius of hemisphere-5
=1.75-5
=4.75
slant height of cone=(5)²+(1.75)²
=25+3.0625
=28.0625
total surface area of cone =pai×r(r+l)
22/7×1.75(1.75+28.0625)
=22/7×1.75(29.8125)
=22×0.25×29.8125
=5.50×29.8125
=163.96875
total area=163.96875+25.7
=189.66875