How long would sunlight take to reach Earth, if Earth is 15 × 107 km away from the Sun
and light travels through space at the speed of 3 × 105 km/sec? [Time= Distance/Speed]
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Answer:
time = distance / speed
= 15* 10 power 7/ 3 * 10 power 5
= 5 * 10 power 2
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