What will be the escape speed from a planet having mass 8 times that of earth and diameter 4 times that of the earth ? `[v_(e)=11.2 km//s]`

Explanation

To find the escape speed from a planet with a mass 8 times that of Earth and a diameter 4 times that of Earth, we can follow these steps:

### Step 1: Understand the formula for escape speed
The escape speed \( v_e \) from a celestial body is given by the formula:
\[ v_e = \sqrt{\frac{2GM}{R}} \]
where \( G \) is the gravitational constant, \( M \) is the mass of the body, and \( R \) is its radius.
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