The correct answer is: C. A is true but R is false
The width of a taxiway is smaller than the runway width because taxiways are designed for aircraft to taxi at slow speeds, while runways are designed for aircraft to take off and land at high speeds. The speed of an aircraft on a taxiway is typically around 10 knots, while the speed of an aircraft on a runway can be up to 200 knots.
The reason R is false because the speed of an aircraft on a taxiway is not greater than that on a runway. In fact, the opposite is true. The speed of an aircraft on a taxiway is typically much slower than the speed of an aircraft on a runway.
Here is a more detailed explanation of each option:
- Option A: Both A and R is true and R is the correct explanation of A
This option is incorrect because the reason R is false. The speed of an aircraft on a taxiway is not greater than that on a runway. In fact, the opposite is true. The speed of an aircraft on a taxiway is typically much slower than the speed of an aircraft on a runway.
- Option B: Both A and R is true but R is not the correct explanation of A
This option is incorrect because the reason R is false. The speed of an aircraft on a taxiway is not greater than that on a runway. In fact, the opposite is true. The speed of an aircraft on a taxiway is typically much slower than the speed of an aircraft on a runway.
- Option C: A is true but R is false
This option is correct because the width of a taxiway is smaller than the runway width, but the speed of an aircraft on a taxiway is not greater than that on a runway.
- Option D: A is false but R is true
This option is incorrect because the width of a taxiway is smaller than the runway width.