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Q.

The radius of the Earth is 6,378 km as calculated by satellites orbiting the Earth. Rounded to the nearest thousand, 6,378 is 

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a

6400

b

6000

c

7000

d

6300

answer is A.

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Detailed Solution

6 378, 3 is less than five. Hence, round 6 in the thousands place. Every digit after the 6 becomes a zero. 

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The radius of the Earth is 6,378 km as calculated by satellites orbiting the Earth. Rounded to the nearest thousand, 6,378 is