Question

A car travels 54 km in 45 minutes then calculate its speed in m/s

Answer 1

Speed = distance/time
distance=54*1000 m
time=45*60 seconds
hence answer is 20m/s

Answer 2

distance = 54 km

converting it into m

54 × 1000m= 54000m

time= 45 minutes

converting it into second

45 × 60 =2700s

we know speed = distance ÷

time

54000÷2700=

20 m per sec