Answer:
In 14 minutes.
Step-by-step explanation:
At the rate of 22 and [tex]\frac{1}{2}[/tex] feet per minute, a hot air balloon is going down.
Therefore, the balloon dissents [tex]22\frac{1}{2} = \frac{45}{2}[/tex] feet per minute.
Therefore, the balloon will dissent 315 feet i.e. there will be a change of elevation by - 315 feet in [tex]\frac{315}{\frac{45}{2} } = \frac{315 \times 2}{45} = 14[/tex] minutes. (Answer)
