A helium spherical balloon is filled at sea level with a volume of 2.00 m³ at a temperature of 20.0°C. The balloon rises to an altitude where the pressure is 0.60 atm and the temperature is -10.0°C. What will be the new radius of the balloon at this altitude?

• A. 0.89 m
• B. 0.93 m
• C. 0.98 m
• D. 1.1 m

Answer: (A)