Question

What is the shortest possible time in which a bacterium could travel a distance of 8.4 cm across a petri dish at a constant speed of 3.5 mm/s?

Answer 1

speed of the bacterium is 3.5 mm/s

$v = 3.5 mm/s$

total distance traveled by bacterium = 8.4 cm

$d = 8.4 cm = 84 mm$

time take to cover the distance

$t = \frac{d}{v}$

$t = \frac{84}{3.5} = 24 s$

so it will take 24 s to move this distance