Question

Is my answer in the drop down menu correct ?

Answer 1

a) Cone

b) TSA = 98.125 sq. inches, LSA = 78.5 sq. inches

Step-by-step explanation:

a) The seashell given us is best modelled by a cone (it has a radius & a slant height)

b) The approximate surface area is given as shown below:

`\begin{gathered} T.S.A=\pi r(l+r) \\ Diameter,D=5in \\ Radius,r=(Diameter)/(2)=(5)/(2)=2.5in \\ l=10in \\ \pi=3.14 \\ \\ T.S.A=3.14*2.5(10+2.5) \\ T.S.A=98.125in^2 \\ \\ OR \\ L.S.A=\pi rl \\ L.S.A=3.14*2.5*10 \\ L.S.A=78.5in^2 \end{gathered}`

The Total Surface Area of the cone is 98.125 sq. inches

The Lateral Surface Area of the cone is 78.5 sq. inches