# Thread: Area and Perimeter Questions

1. ## Area and Perimeter Questions

I'm kinda lost here:

Which is larger A or B? Justify your answer with full and appropriate working,

A: The Surface Area of a cube of side 2 cm
B: The Surface Area of a closed cylinder of diameter 2 cm and height 2cm. Use the value of (Pie sign) on your calculator and round your final answer to two decimal places.

2. A. Surface area of cube = $6s^2 = 24 \ \text{cm}^2$

B. Surface area of closed cylinder: $2 \pi rh + 2 \pi r^2 = 8 \pi + 8 \pi = 16 \pi \approx 50.27 \ \text{cm}^2$

So B is larger.