An aircraft with mass of 400,000 kg cruises at 240 m/s at an altitude of 10 km. Its lift to drag
ratio at cruise is 15. Assuming g as 9.81 m/s2, the power (in MW) needed for it to cruise is
_______ (accurate to two decimal places).
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2018 Q.40)**
**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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