To add 2.70 hours and 93.0 minutes, and then convert the total to seconds, let's break it down step by step:

1. Convert hours to minutes: $2.70 \, \text{hours} = 2.70 \times 60 = 162.0 \, \text{minutes}$

2. Add the minutes: $162.0 \, \text{minutes} + 93.0 \, \text{minutes} = 255.0 \, \text{minutes}$

3. Convert the total minutes to seconds: $255.0 \, \text{minutes} = 255.0 \times 60 = 15,300 \, \text{seconds}$

So, the total time in seconds is 15,300 seconds.

Would you like further details, or do you have any questions?

Here are 5 related questions for further practice:

1. How many seconds are there in 5.25 hours?
2. Convert 144.5 minutes into hours and seconds.
3. Add 1.5 hours and 150 minutes, and convert it to seconds.
4. How many minutes are there in 2.5 hours?
5. Convert 3 hours and 45 minutes to seconds.

Tip: To quickly convert hours to seconds, you can multiply by 3600 since there are 3600 seconds in an hour.