The Curiosity Rover has recently landed on Mars and likes to send Twitter updates on its progress. If a tweet is posted 15 minutes after it was sent, how far is Curiosity from Earth?

2.7 x 10¹¹ m

Explanation:

Given,

time = 15 minutes

1 min = 60 s

15 min = 15 x 60 = 900 s

Distance of Curiosity from earth

D = Speed x time

Speed of light = 3 x 10⁸ m/s

D = 3 x 10⁸ x 900

D = 2.7 x 10¹¹ m

Distance of curiosity from earth is equal to 2.7 x 10¹¹ m