Q: i can not delite my photoes

Hello doha surendra,

It could be that your photos were synced with your computer and that may be why you are unable to delete them. If that is the case, to remove them you need to change the sync options within iTunes to have them removed. Take a look at the article below for more details. 

Sync photos from your computer to your iOS device using iTunes
https://support.apple.com/en-us/HT201313
 

Delete synced photos

1. In iTunes, locate and click on your device.
2. Click Photos.
3. Choose "Selected albums" and deselect the albums or collections you want to delete.
   To delete all synced photos, deselect "Sync Photos from" and, when asked, click "Remove photos."
4. Click Apply.

Learn how to delete photos and video synced from iTunes when you can't access the originals.

Have a good day.