While riding his bike, Riley was able to travel 10 km from his house. He began his journey at the end of his driveway and rode
up a hill for 3 blocks before making a right-hand turn. He
continued for 4.8 km before turning around and returning
home. The entire trip took Riley 25 minutes. Which of the
following correctly describes the average speed of his bike ride?

there are no correct statementd on the list of choices you provided.

magnified images possible images can be real = projected onto a screen

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.