At this moment, it is 18 hours and 27 minutes. What was the time 2880717 minutes earlier?
(a) $6 \mathrm{~h} 22 \mathrm{~min}$
(b) $6 \mathrm{~h} 24 \mathrm{~min}$
(c) $6 \mathrm{~h} 27 \mathrm{~min}$
(d) $6 \mathrm{~h} 30 \mathrm{~min}$
(e) $6 \mathrm{~h} 32 \mathrm{~min}$
The correct option is (d).

Dividing 2880717 by 60, we get $2880717=48011 \times 60+57$. This means that $2880717 \mathrm{~min}=48011 \mathrm{~h}+57 \mathrm{~min}$. We can then write:

$$
2880717 \mathrm{~min}=\underbrace{48000 \mathrm{~h}}_{2000 \text { days }}+11 \mathrm{~h}+57 \mathrm{~min}
$$

The 2000 days do not affect the time we are looking for, and since 18 hours and 27 minutes are exactly 17 hours and 87 minutes, the answer is $18 \mathrm{~h} 87 \mathrm{~min}-11 \mathrm{~h} 57 \mathrm{~min}=$ 6h30min.