Yumi walked 2 km to a bus stop to catch the bust to school. The bus arrived straight away and averaged 60km/h for the 5km trip.

Question

Yumi's total travelling time was 25 minutes.
at what average speed did Yumi walk to the bus stop?
The answer is 6, but the only thing I could think of to get to there is 60km/h / 5km trip
is 12mins for the bus trip, which leaves 13 minutes left, and dividing that by 2 km to get the km/h, which would equal 6.5.

Answer 1

time on bus = (5/60)hr
= (5/60)(60) = 5 minutes

so he walked for 20 inutes
20 minutes (1 hour/60 min) = (1/3)hr

2 km/(1/3)hr = 6 km/hr

Answer 2

time on bus = distance / rate
= 5km/60 km/h
= .08333 hrs = 5 minutes

(you had distance = rate/distance !)

that leaves 20 minutes or 1/3 hour for walking the 2 km

rate of walking = 2/(1/3) = 2(3/1)
= 6 km/h