一个由 5 名女生组成的小组预订了一台电脑，使用时间为 2 小时。她们轮流使用这台电脑来完成她们的项目。在任何时刻，都只有 3 名女生在电脑前工作。平均而言，每个女生使用电脑多长时间？请用小时和分钟给出你的答案。

1. Calculate the total computer time available

Since 3 girls are working on the computer at any one time for 2 hours, the total computer time available is $3 \times 2 = 6$ hours.

2. Calculate the average time each girl worked

The total computer time is shared equally among the 5 girls.
Average time per girl = $\frac{6}{5} = 1.2$ hours.

3. Convert the time into hours and minutes

$1.2$ hours = $1$ hour and $0.2 \times 60$ minutes = $1$ hour $12$ minutes.