Question

A balloon weighing $50kg$ is filled with $685kg$ of helium at $1atm$ pressure and ${25}^{o}C$. What will be its pay load if it displaced $5108kg$ of air?

• A. $4373kg$
• B. $4423kg$
• C. $5793kg$
• D. none of these

Answer 1

The correct option is A $4373kg$

Payload can be explained as the difference between the mass of the air displaced and that of the mass of the balloon. It is important to note that the mass of the balloon is the sum total of mass of balloon skin itself and the mass of helium filled in it.

Hence,

Payload$=5108-(50+685.2)=4372.8\approx 4373kg$