Question

Question 75
the surface area of the figure below is 305.49 square units
True or False

Answer 1

False

Explanation:

SA=2πrh+2πr²

SA = 2 · (3.14) · 3.6 · 9.7 + 2 · (3.14) · 3.6²

SA = 6.28 · 34.92 + 6.28 · 12.96

SA = 219.30 + 81.39

SA = 300.69

Answer 2

For this case we have that by definition, the surface area of a cylinder is given by:

`SA = 2 \pi * r * h + 2 \pi * r ^ 2`

Where:

A: It's the radio

h: It's the height

Substituting according to the data we have:

`SA = 2 \pi * 3.6 * 9.7 + 2 \pi * (3.6) ^ 2\\SA = 219.2976 + 81.3888\\SA = 300.6864 \ units ^ 2`

If we round up we have:

`SA = 300.69 \ units ^ 2`

Answer:

False