# Matt set a record for the men's 100 m freestyle even in swimming. It took him 49.17 s to swim the 50.0 m length of the pool and swim back. Assume that half of Matt's record time was spent traveling the length of the pool. What was his speed?

Jun 28, 2018

$2.03$ $m / s$

#### Explanation:

$49.17 s$ was half of the record time.

the full record time would therefore be $49.17 s \cdot 2$, which is $98.34 s$.

the full length of the race in the full record time is $100 m$ in $49.17 s$.

average speed = total distance / total time

total distance / total time $= \frac{100 m}{49.17 s}$

$\frac{100}{49.17} = 2.03 \left(3 s . f .\right)$

average speed $= 2.03$ $m / s$ $\left(3 s . f .\right)$