A person walks 3 miles in 1 hour, then walks 4 miles in 2 hours. He stops for lunch for one hour to rest. Then he walks 3 miles in 1 more hour. What is his average speed for the journey?

What is the equation for average speed?

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

A person walks 3 miles in 1 hour, then walks 4 miles in 2 hours. He stops for lunch for one hour to rest. Then he walks 3 miles in 1 more hour. What is his 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.   ?    7 miles
2.   ?    11 miles
3.   ?    12 miles
4.   ?    10 miles

A person walks 3 miles in 1 hour, then walks 4 miles in 2 hours. He stops for lunch for one hour to rest. Then he walks 3 miles in 1 more hour. What is his average speed for the journey?

Equation: S_ave = D_total/T_total

D_total = 10 miles

What is the total time for the journey?

1.   ?    6 hours
2.   ?    3 hours
3.   ?    5 hours
4.   ?    4 hours

A person walks 3 miles in 1 hour, then walks 4 miles in 2 hours. He stops for lunch for one hour to rest. Then he walks 3 miles in 1 more hour. What is his average speed for the journey?

Equation: S_ave = D_total/T_total

D_total = 10 miles
T_total = 5 hours

Which of the following is correct?

1.   ?    S_ave = 10mi + 5hr
2.   ?    S_ave = 10mi/5hr
3.   ?    S_ave = (10 mi)(5hr)
4.   ?    S_ave = 5hr/10mi

A person walks 3 miles in 1 hour, then walks 4 miles in 2 hours. He stops for lunch for one hour to rest. Then he walks 3 miles in 1 more hour. What is his average speed for the journey?

Equation: S_ave = D_total/T_total

D_total = 10 miles
T_total = 5 hours
S_ave = 10mi/5hr

Which of the following is correct?

1.   ?    S_ave = 15 m/s
2.   ?    S_ave = 15 mph
3.   ?    S_ave = 2 mph
4.   ?    S_ave = 2 m/h