If a room has dimensions 3m x 4m x 5m, what is the mass of air in the room if density of air at NTP is 1.3kg/m^(3)

If a room has dimensions 3m x 4m x 5m, what is the mass of air in the

1.	If a room has dimensions 3m x 4m x 5m, what is the mass of air in the room if density of air at NTP is 1.3kg/m^(3)
Answer» <html><body><p></p>Solution :`m=rhoxxv=(1.3kg//m^(<a href="https://interviewquestions.tuteehub.com/tag/3-301577" style="font-weight:bold;" target="_blank" title="Click to know more about 3">3</a>))(3xx4xx5m^(3))=78 kg`<br/>i.e. ,mass of <a href="https://interviewquestions.tuteehub.com/tag/air-852233" style="font-weight:bold;" target="_blank" title="Click to know more about AIR">AIR</a> in the <a href="https://interviewquestions.tuteehub.com/tag/room-25779" style="font-weight:bold;" target="_blank" title="Click to know more about ROOM">ROOM</a> is 78 kg which is unbelievable (as air is assumed to be <a href="https://interviewquestions.tuteehub.com/tag/weightless-3272644" style="font-weight:bold;" target="_blank" title="Click to know more about WEIGHTLESS">WEIGHTLESS</a>) but is <a href="https://interviewquestions.tuteehub.com/tag/true-713260" style="font-weight:bold;" target="_blank" title="Click to know more about TRUE">TRUE</a>.</body></html>