Find the mass of the earth from the following data. The period of lunar orbit around the earth is 27.3 days and radius of the orbit `3.9 xx 10^(5) km. G = 6.67 xx 10^(-11) Nm^(-2) kg^(-2)`.

Explanation

To find the mass of the Earth using the given data about the lunar orbit, we can follow these steps:

### Step 1: Convert the Period of the Lunar Orbit to Seconds
The period of the lunar orbit is given as 27.3 days. We need to convert this into seconds.

\[ \text{Period (T)} = 27.3 \text{ days} \times 24 \text{ hours/day} \times 60 \text{ minutes/hour} \times 60 \text{ seconds/minute} \]
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