A biker rides 13 miles in 2 hours, then stops for lunch for 1 hour. The biker then resumes his ride for 1 hour, but only rides 3 miles. What is the biker's average speed for the journey?

What is the equation for average speed?

1.   ?    S_ave = D_total/T_total
2.   ?    S_ave = ΔD/ΔT
3.   ?    S_ave = DT
4.   ?    S_ave = D_total(T_total)

A biker rides 13 miles in 2 hours, then stops for lunch for 1 hour. The biker then resumes his ride for 1 hour, but only rides 3 miles. What is the biker's average speed for the journey?

Equation: S_ave = D_total/T_total

So we need to find the total distance and total time.
What is the total distance traveled?

1.   ?    16 miles
2.   ?    13 miles
3.   ?    18 miles
4.   ?    17 miles

A biker rides 13 miles in 2 hours, then stops for lunch for 1 hour. The biker then resumes his ride for 1 hour, but only rides 3 miles. What is the biker's average speed for the journey?

Equation: S_ave = D_total/T_total

D_total = 16 miles

What is the total time for the journey?

1.   ?    4 hours
2.   ?    3 hours
3.   ?    2 hours
4.   ?    5 hours

A biker rides 13 miles in 2 hours, then stops for lunch for 1 hour. The biker then resumes his ride for 1 hour, but only rides 3 miles. What is the biker's average speed for the journey?

Equation: S_ave = D_total/T_total

D_total = 16 miles
T_total = 4 hours

Which of the following is correct?

1.   ?    S_ave = 16mi/4hr
2.   ?    S_ave = (16 mi)(4hr)
3.   ?    S_ave = 16mi + 4hr
4.   ?    S_ave = 4hr/16mi

A biker rides 13 miles in 2 hours, then stops for lunch for 1 hour. The biker then resumes his ride for 1 hour, but only rides 3 miles. What is the biker's average speed for the journey?

Equation: S_ave = D_total/T_total

D_total = 16 miles
T_total = 4 hours
S_ave = 16mi/4hr

Which of the following is correct?

1.   ?    S_ave = 4 mph
2.   ?    S_ave = 4 m/h
3.   ?    S_ave = 12 mph
4.   ?    S_ave = 20 m/s