What is the surface area of the cone? (Use 3.14 for π.)
2 answers:
Answer: 117.226666667 cm^3
Step-by-step explanation:
So, we all know the formula for working out the volume of a cone is
V= 1/3πr^2h
V = 1÷3 x 3.14 × r^2 x h
The radius is half the diameter. Your diameter is 8 so the radius would be 4. And 7 is your height by the way.
So let's plot it all in!
V= 1÷3 x 3.14 × 4^2 x 7
V = 117.226666667cm^3
Round to the nearest 10 = 117.2cm^3
To the nearest 100 = 117.23cm^3
To the nearest whole number = 117cm^3
Answer:
Surface area = 87.92 Sq Inch and Total surface area =138.16 Sq Inches
Step-by-step explanation:
Here we are required to find the surface area of a cone, The formula of surface area of a cone is given as under
r=4
l = 7



Also the total surface area is given as

We are given
Now we put the values of r and l in main formula

Hence the Surface area is 87.92 sq inches and Total surface area of the cone is 138.16
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