At MKC, which altitude corresponds to a wind of 200° true at 6 knots with a temperature of +3°C?

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Multiple Choice

At MKC, which altitude corresponds to a wind of 200° true at 6 knots with a temperature of +3°C?

Explanation:
This question relies on how the standard atmosphere behaves with height. In ISA, the temperature starts at 15°C at the surface and decreases by about 2°C for every 1,000 feet you climb. So at any altitude h (in feet), the ISA temperature is approximately 15 - 2*(h/1000). If the observed temperature is +3°C, set 3 = 15 - 2*(h/1000). That gives 12 = 2*(h/1000), so h/1000 = 6, and h = 6,000 feet. So the altitude that corresponds to a temperature of +3°C is about 6,000 feet. The wind information (200° true at 6 knots) is consistent with the conditions at that level, reinforcing that 6,000 feet is the correct altitude.

This question relies on how the standard atmosphere behaves with height. In ISA, the temperature starts at 15°C at the surface and decreases by about 2°C for every 1,000 feet you climb. So at any altitude h (in feet), the ISA temperature is approximately 15 - 2*(h/1000).

If the observed temperature is +3°C, set 3 = 15 - 2*(h/1000). That gives 12 = 2*(h/1000), so h/1000 = 6, and h = 6,000 feet. So the altitude that corresponds to a temperature of +3°C is about 6,000 feet. The wind information (200° true at 6 knots) is consistent with the conditions at that level, reinforcing that 6,000 feet is the correct altitude.

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