What is the minimum volume of hot air needed to lift a hot air balloon carrying 800 kg?

The minimum volume of hot air needed to lift the hot air balloon is 653.06m³

Step-by-step explanation:

Density is defined as the ratio of the mass of a substance to its unit volume.

Density = Mass/Volume

Given mass of balloon = 800kg

Density of air = 1.225 kg/m3 {standard value}

Volume = Mass/Density

Volume = 800/1.225

Volume = 653.06m³

The minimum volume of hot air needed to lift the hot air balloon is 653.06m³