In this image i have given the screenshot of my command prompt,anyone know this please explain how access root in android emulator
From your screenshot, I can't actually tell which image your are trying to boot. You could actually try running Google APIs Intel images as opposed to Google Play images. As discussed in the linked question you could also utilise an older ramdisk.img.
Alternatively just push the su binary, if you want wide-access root for any app you install on your emulator.