At the closest approach, the distance between Mars and Earth is found to be `58` million `km`. When planets are at this closest distance, how long would it take to send a radio message from a space probe of mars to earth?
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Distance between mars and earth = 58 million km `=58 xx 10^(6)km`
Time taken to send a radio message to earth `=(“Distance”)/(“Velocity of light”)=((58 xx 10^(9)m))/((3 xx 10^(8)ms^(-1)))=193.3s`