[Algebra]
Problem: Let $T=60$ . Lydia is a professional swimmer and can swim one-fifth of a lap of a pool in an impressive 20.19 seconds, and she swims at a constant rate. Rounded to the nearest integer, compute the number of minutes required for Lydia to swim $T$ laps.

Solution: Lydia swims a lap in $5 \cdot 20.19=100.95$ seconds. The number of minutes required for Lydia to swim $T$ laps is therefore $100.95 \cdot T / 60$. With $T=60$, the desired number of minutes, rounded to the nearest integer, is 101

Final answer: 101