A GPS satellite develops a fault whereby it moves into an orbit 19 800 kmabove t

A GPS satellite develops a fault whereby it moves into an orbit 19 800 kmabove the Earth’s surface and also emits a weak signal whose power is only20 W. What will be the power per square metre of the signal received on theEarth’s surface? . (W/m2represents ‘watts per square metre’.)
Requirements:

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