Question

Calculate the surface area of a sphere with radius, r, 5 cm.The formula for the surface area, A, is A = 4 pi r ^2? Use pi= 3.1416 in your calculation.Give your answer to 2 decimal places and include units.

Answer 1

Given:-

`r=5`

To find the surface area.

So now we use the formula,

`A=4\pi r^2`

So now we substitute the value. so we get,

`\begin{gathered} A=4\pi r^2 \\ A=4*\pi*5^2 \\ A=4*3.14*25 \\ A=3.14*100 \\ A=314 \end{gathered}`

So the required surface area is 314 sq.units.