Question

Rita take 20 min to cover a distance of 4km. Calculate her speed in km/h and m/s

Answer 1

Explanation:

$distance \: covered = 4 \: km = 4000 \: m\\ time \: taken = 20 \: min \: \\ = 1200 \: seconds = \frac{1200}{3600}h = \frac{1}{3} h \\ speed = \frac{distance}{time}$

$speed = \frac{4 \: km}{ \frac{1}{3}h } = 12 \: km {h}^{ - 1}$

$speed = \frac{4000 \: m \: }{1200 \: seonds}$

$speed = 3.33 \: m {s}^{ - 1}$