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Explanation:
distance = 1.560 × 10⁸ km= 1.560×10¹¹m
Speed (of light) = 3×10⁸m/s
time = distance/speed
=>1.560×10¹¹/3×10⁵ = 0.52×10⁶s = 52×10⁴ seconds.
hope this helps you.