An airport radar system transmits a signal in a particular direction, and a measurement of the receiver output is recorded. Each radar measurement is classified as:

• W: A reflection from a weather event, such as rain clouds.
• A: A reflection from an aircraft.
• N = (W ∪ A) c : No reflection.

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explanation:

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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this is poiselle's equation from fluid mechanic in physics. mech eng