Answer:
h=31.4 cm
Step-by-step explanation:
A=lateral surface area
c=circumference
h=height
A= c*h
solving for h we get:
h=A/c=120pi/12=10pi
What is the surface area of the composite figure? (Use 3.14 for π .)
1 answer:
The picture in the attached figure
we know that
surface area of the figure=[surface area of hemisphere]+[surface area of the cylinder]
step1
find the surface area of hemisphere
surface area hemisphere=2*pi*r²
for r=8 in
surface area hemisphere=2*pi*8²-----> 401.92 in²
step 2
find the surface area of the cylinder
surface area of cylinder=area of the base+perimeter of the base*height
area of the base=pi*r²
for r=8 in
area of the base=pi*8²----> 200.96 in²
perimeter of the base=2*pi*r----> 2*pi*8-----> 50.24 in
surface area of cylinder=200.96+50.24*7-----> 552.64 in²
step 3
surface area of the figure=[surface area of hemisphere]+[surface area of the cylinder]
surface area of the figure=[401.92]+[552.64]-----> 954.56 in²
the answer is
954.56 in²
we know that
surface area of the figure=[surface area of hemisphere]+[surface area of the cylinder]
step1
find the surface area of hemisphere
surface area hemisphere=2*pi*r²
for r=8 in
surface area hemisphere=2*pi*8²-----> 401.92 in²
step 2
find the surface area of the cylinder
surface area of cylinder=area of the base+perimeter of the base*height
area of the base=pi*r²
for r=8 in
area of the base=pi*8²----> 200.96 in²
perimeter of the base=2*pi*r----> 2*pi*8-----> 50.24 in
surface area of cylinder=200.96+50.24*7-----> 552.64 in²
step 3
surface area of the figure=[surface area of hemisphere]+[surface area of the cylinder]
surface area of the figure=[401.92]+[552.64]-----> 954.56 in²
the answer is
954.56 in²
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