In order to restore the same, i downloaded the firmware of the tab version from official website.
Next ,copy the firmware files to the SD card (format the SD card first and then copy the files)
Now press the power button and volume up to load the firmware from device.
There you go,now you have successfully restored your tab.
Wiki about Firmware :
In electronic systems and computing, firmware is a type of software that provides control, monitoring and data manipulation of engineered products and systems.
Firmware is held in non-volatile memory devices such as ROM, EPROM, or flash memory.