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1. |
A new unit of length is chosen such that the speed of light in a vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit, if light takes 8 minutes and 20 seconds to cover this distance? |
A. | 820 units |
B. | 500 units |
C. | 1500 units |
D. | 2460 units |
Answer» C. 1500 units | |