Question

Find the unit rate. Run 400 meters in 1 min 32 s. Have no idea, please help.

Answer 1

400m / 92s = 4.35 m/s

or,

400m / 1.533 min = 260.9 m/min

Answer 2

400 m in 1min, 32 sec = 92 seconds
so 100 m in 92/4 or 23 seconds

you did not specify what rate we are talking about
m/s or s/m or ...