Single speed CDROMs read up to 75 sectors per second. A data sector on a CDROM is 2048 bytes. So read speed for an "1x CDROM" is 150 KiB/sec. I bolded 'up to' since not all drives reach this speed. Many drives from that area managed 130-140 KiB/sec.
Regardless, 150KB/sec is the current accepted speed for an 1x CDROM.
A CDROM is called 2x if it can read up to 300 KiB/sec (2x150)
A CDROM is called 4x if it can read up to 600 KiB/sec (4x150)
24 speed is 24x150 KiB/sec is 3600 KiB/sec.
That assumes that:
- The system is generating data fast enough so you actually have something to write.
- That the writer is capable of that speed (well, that is a given in your question).
- That the medium allow writing at that speed. (Your medium allows up to 52x writing).
- That the drive is already spun up.
- That the drive is ready to write actual data. E.g. no need to start with a lead-in.
Is this MB or MiB?
My answer is in KiB since a data sector on a CDROM is 2048 bytes, or 2 KiB.
If you want it in MB: 3600/1000 -> 3.6 MB/sec
If you want it in MiB: 3600/1024 -> 3.51 MiB/sec