The average of all solar days in which the earth completes one revolution around the sun is called ____.
A
Solar day
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B
Mean solar day
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C
Hour
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D
Millenium
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Solution
The correct option is B Mean solar day The average of all solar days in which the earth completes one revolution around the sun is called the mean solar day. The mean solar day is divided into twenty-four equal intervals and each interval is called hour.