What should be the angle of incidence for sunlight on a plane mirror so that the rescue pilot sees the reflected light?

The incidence angle is 27°

Explanation:

As the complete question is not given, the complete question is given here

The angle between the Sun and a rescue aircraft is 54 degrees. What should be the angle of incidence for sunlight on a plane mirror so that the rescue pilot sees the reflected light?

From the question, the total angle between the Sun and the aircraft is 54 degrees which is the sum of the incidence and the reflected angle so

Also from the law of reflection

So now the equation becomes

So the incidence angle is 27°

0.19 m/s and 0.45 m/s