The radius of the Earth is approximately `6.37xx10^(6)m`.
Find (i) circumference in kilometres,
(ii) surface area in square kilometres,
and (iii) volume in cubic kilometres.

Explanation

To solve the problem, we need to find the circumference, surface area, and volume of the Earth given its radius. The radius of the Earth is approximately \(6.37 \times 10^6\) meters. We will perform the calculations step by step.

### Step 1: Convert the radius from meters to kilometers
Since we need the final answers in kilometers, we first convert the radius from meters to kilometers.

\[ \text{Radius in kilometers} = 6.37 \times 10^6 \text{ m} \times \frac{1 \text{ km}}{1000 \text{ m}} = 6.37 \times 10^3 \text{ km} \]
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