Question

A star is 20 light years from the Earth.
How much time does it take for the light
from the star to reach the Earth?​

Answer 1

Answer:

20 years

Explanation:

the time taken by light to travel 1 light year is 1 year therefore to travel 20 light years it will take 20 years

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Answer 2

A star is 20 light years from the Earth.

How much time does it take for the light from the star to reach the Earth?

Solution:

20 years as the statement itself says 20 loght year far.