A balloon when cooled to 33 C has a volume of 120 mL. What is the initial temperature in C of a 200 mL balloon?
Assuming the pressure is in changed then V1/T1 = V2/T2 where V is volume and T is absolute temperature.
120/(273 + 33) = 200/(273 + t), where t is initial temperature in C.
I'll you to do the manipulations needed to find the actual value of t.