9979 x 10^8 m/s,如何转换到 km/

9979 x 10^8 m/s,如何转换到 km/hr?

1个回答

2.9979 × 10^8 m/s
= 2.9979 × 10^8 m ÷ 1 s
= 2.9979 × 10^5 km ÷ 1/3600 hr
=1.079 × 10^9 km/h