Answer : The temperature of balloon increases to 10 times of original temperature.
Explanation :
In this problem, volume remain constant. The temperature and pressure will vary.
Gay-Lussac's Law : It is defined as the pressure of the gas is directly proportional to the temperature of the gas at constant volume and number of moles.

or,

where,
= let initial pressure = x
= final pressure = 10x
= initial temperature
= final temperature
Now put all the given values in the above equation, we get:



From this we conclude that, the temperature increases to 10 times of original temperature.
Hence, the temperature of balloon increases to 10 times of original temperature.