Answer:
After 5 minutes the two balloons will be at the same height.
Step-by-step explanation:
Let, the two balloons will be at the same height after t minutes.
Then, according to the question,
15 + 20t = 195 - 16t
⇒ 36t = 180
⇒ t = [tex]\frac {180}{36}[/tex]
⇒ t = 5
So, after 5 minutes the two balloons will be at the same height.
