A star is 8.1 × 1013 km away from the earth. Suppose light travels at the speed

Question

A star is 8.1 × 1013 km away from the earth. Suppose light travels at the speed of 3.0 × 105 km per second. How long will it take the light from the star to reach the earth ?

Options:

A . 7.5 × 103 hours

B . 7.5 × 104 hours

C . 2.7 × 1010 seconds

D . 2.7 × 1011 seconds

Answer: Option B

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