The correct answer would be 1.375 < t < 3 i hope this helps anyone
Answer:
33.33 seconds
Explanation:

= Initial length pulled = 20 cm
b = Damping constant = 0.015 kg/s
k = Spring constant = 4 N/m
m = Mass of glider = 250 g
Time period is given by

Using exponential decay formula

Final amplitude = Initial times decay

The time taken is 33.33 seconds
Because gas and liquid are both different things