Given the radius r = 1.4 m.

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Here's how to find the perimeter and area of the circular hall:

Step 1: Calculate the perimeter (circumference) of the circular hall. The formula for the circumference of a circle is $C = 2\pi r$. Given the radius $r = 1.4 \text{ m}$. $C = 2 \times \pi \times 1.4 \text{ m}$ $C = 2.8\pi \text{ m}$ Using $\pi \approx 3.14159$: $C \approx 2.8 \times 3.14159 \text{ m}$ $C \approx 8.796452 \text{ m}$ Rounding to two decimal places: $C \approx \text{8.80 m}$

Step 2: Calculate the area of the circular hall. The formula for the area of a circle is $A = \pi r^2$. Given the radius $r = 1.4 \text{ m}$. $A = \pi \times (1.4 m)^2$ $A = \pi \times 1.96 m^2$ $A = 1.96\pi m^2$ Using $\pi \approx 3.14159$: $A \approx 1.96 \times 3.14159 m^2$ $A \approx 6.1575244 m^2$ Rounding to two decimal places: A \approx \text{6.16 m^2}

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