1. The speed of light is 300,000 kilometers per second, and the distance from the Sun to the Earth is 150 million kilometers. Question: How many minutes does it take for light to travel from the Sun to the Earth (round the answer to one decimal place)?
1. It takes about 8.3 minutes from the Sun to the Earth
1. 【Solution】Convert the distance unit to "ten thousand kilometers", and the time unit to "minutes"
The speed of light $=30$ ten thousand kilometers $/$ second $=1800$ ten thousand kilometers/minute, distance $=1$ hundred million 5 ten million kilometers $=15000$ ten thousand kilometers.
$$
\text { Time }=\text { Distance } \div \text { Speed }=15000 \div 1800=8 \frac{1}{3} \text { (minutes) } \approx 8.3 \text { (minutes) }
$$