Calculate the velocity of sound in air at NTP. The density of air at NTP is `(1.29g)//(L)`. Assume air to be diatomic with `gamma=1.4`. Also calculate the velocity of sound in air at `27^@C`.

Explanation

To calculate the velocity of sound in air at Normal Temperature and Pressure (NTP) and at 27°C, we will follow these steps:

### Step 1: Understand the Given Data
- **Density of air at NTP (ρ)**: 1.29 g/L = 1.29 kg/m³ (conversion to SI units)
- **Pressure at NTP (P)**: 1.013 × 10⁵ Pa
- **Temperature at NTP (T)**: 20°C = 293 K
- **Gamma (γ)**: 1.4 (for diatomic gases like air)

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