Answer:
ans b is the correct answer because
first we should have to multiply 1.4×10 power 6 which means 14000000 km
then we should divide with mars diameter which is 7000 km
14000000/7000km= 2× 10 power 3
2× 10 power 3
2×1000
therefore 2000 km is the ans
hope you understand
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