Question

Find the surface area of the tunnel created inside the block.

Answer 1

The surface area of the tunnel passing through the block is simply the curved surface area of the cylindrical shape.

The Surface Area is given by

`A=2\pi rh`

where the following are given from the question:

`\begin{gathered} r=(4)/(2)=2ft \\ h=4ft \end{gathered}`

Substituting these values:

`\begin{gathered} A=2*\pi*2*4 \\ A=50.27 \end{gathered}`

Therefore, the surface area of the tunnel created inside the block is 50.27 ft² (50.27 square feet)