I am using an Arduino Mega2560. Using Arduino Mega as ISP to burn sketch, I had loaded bootloader from Arduino IDE.

I uploaded the blink led code to the Mega. But the led is responding slow. Same with Serial code. Delay of 0.1 second acting as 1 second on my board. In code serial communication baudrate is 9600 but I am getting proper value when I set the baudrate to 4800 in serial monitor.

Could anyone point out the problem? Thanks