Answer:
The volume is decreasing at a rate of 250 cm^3/min
Step-by-step explanation:
From Boyle's law, the relationship between pressure (P) and volume (V) is inverse in which increase in one quantity (P) leads to a corresponding decrease in the other quantity (V).
Pressure at a certain instant (time) = 80 kPa
Rate at which pressure is increasing = 20 kPa/min
Time required for this increase = pressure ÷ rate = 80 ÷ 20 = 4 min
Volume = 1000 cm^3
Rate at which volume is decreasing at the same time pressure is increasing = 1000 ÷ 4 = 250 cm^3/min
