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?
0.15 is in minutes, and when i convert it to seconds it's 9, but the only available answer for 9 is 9 km/h, which makes no sense, so is it B?
no, it was D... i don't understand how but it was
3 km/20 min = 3 km / (1/3)hr = 9 km/hr
The point is that 20 min = 1/3 hour
To find Suzanne's average speed, we can use the formula:
Average speed = Total distance / Total time
The total distance Suzanne travels in a day is 3 km. The given time is 20 minutes.
To convert minutes to hours, we need to divide the time by 60:
20 minutes รท 60 = 0.33 hours
Now we can substitute the values into the formula:
Average speed = 3 km / 0.33 hours
Dividing 3 km by 0.33 hours gives us approximately 9.09 km/h.
Therefore, the correct answer is D. 9 km/h.