The ratio of densities of helium and hydrogen is 4 : 2. Calculate the temperature at which the speed of sound in helium will be equal to speed in hydrogen at `27^(@)`C ?

Explanation

To solve the problem, we need to find the temperature at which the speed of sound in helium equals the speed of sound in hydrogen at 27°C. Let's break this down step by step.

### Step 1: Understand the given data
We are given the ratio of densities of helium (He) and hydrogen (H2) as:
\[ \frac{\rho_{He}}{\rho_{H2}} = \frac{4}{2} = 2 \]
This means that the density of helium is twice that of hydrogen.
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