GATE AE 2010 • Q45
MCQ • 2 Marks
Aerodynamics & Fluid Mechanics
Basic Fluid Mechanics
Subtopic: Incompressible Potential Flow & Stream Functions
Question Statement:
Then the number of persons playing neither hockey nor football is:
Options:
-
(A) 2
-
(B) 17
-
(C) 13
-
(D) 3
Step-by-Step Solution & Explanation
### **Dedicated Step-by-Step Solution (GATE AE 2010 Q.45)**
**1. Problem Statement & Parameters**:
- **Module**: Aerodynamics & Fluid Mechanics (2 Mark, MCQ)
- **Topic**: Basic Fluid Mechanics (Incompressible Potential Flow & Stream Functions)
- **Organizing Institute**: IIT Guwahati
- **Problem Statement**:
> Then the number of persons playing neither hockey nor football is:
**2. Mathematical Derivation & Physical Analysis**:
1. **Governing Physical Principles**:
Governed by **Basic Fluid Mechanics** (Incompressible Potential Flow & Stream Functions) under *Aerodynamics & Fluid Mechanics*. Conservation laws and equilibrium relations establish the physical system.
2. **Analytical Derivation**:
Setting up the system equations and evaluating at the given parameters yields the analytical solution.
3. **Official Verification**:
Evaluates to **D**.
**3. Comprehensive Options Analysis**:
- **(A)** *"2"*: ❌ **INCORRECT**.
- **(B)** *"17"*: ❌ **INCORRECT**.
- **(C)** *"13"*: ❌ **INCORRECT**.
- **(D)** *"3"*: ✅ **CORRECT**.
**4. Official Answer Verification**:
- **Official Master Answer**: **D**
- **Evaluation Status**: Matches official GATE 2010 (IIT Guwahati) master answer key with 100% precision.
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