physics
posted by forrest
Suzanne bikes 3 km to school every day. It takes her 20 minutes because she always has to stop at a traffic light. What is her average speed?
A. 0.15 km/s
B. 3 m/s
C. 6.7 km/minute
D. 9 km/h
i keep picking A and C and getting this wrong. i know this is the formula:
s = d/t
but when you do it the time conversion isn't correct, and when i try to multiply it by 60 or figure it out it doesn't work. :( how do i do this?
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