For an aircraft moving at 4 km altitude above mean sea level at a Mach number of
0.2, the ratio of equivalent air speed to true air speed is _______ ( rounded off to 2
decimal places).
The density of air at mean sea level is 1.225 kg/m3 and at 4 km altitude is
0.819 kg/m3.
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2024 Q.61)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Incompressible & Compressible Aerodynamics** under *Aerodynamics & Fluid Mechanics* (2 Marks, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Incompressible & Compressible Aerodynamics equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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