The radius of earth is 6347 km. Its roun...

The radius of earth is 6347 km. Its rounded off value up to two significant figures is

A

6400km

B

`6.4 xx 10^(3)km`

C

`6.3 xx 10^(3)km`

D

`6.35 xx 10^(3)km`

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The correct Answer is:

A

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