3.38 It is known that a freely falling body travels 4.9 m in the first second, and in each subsequent second, it travels 9.8 m more than in the previous one. If two bodies start falling from the same height, one 5 s after the other, then after what time will they be 220.5 m apart from each other?
3.38 Instruction. Use the well-known physics formula $s=4.9 t^{2}$.

Answer: 7 seconds after the start of the fall of the first body.