1. The 3 formulas for Speed, Time & Distance:
Speed x
Time
Solving for Speed
Solving for Time
Solving for Distance D S T
Remember them from
this triangle:

2. d=____________ s=____________ t=_____________
A windsurfer travelled 28 km in 1 hour 45 mins.
Calculate his speed.
d=____________
s=____________
t=_____________ D S T

3. Answer: His rate (speed) was 16 km / hour
A windsurfer travelled 28 km in 1 hour 45 mins.
Calculate his speed.
Distance
Time D S T
Speed = 28
1•75 =
1 hour 45 mins
= 16 km/h
Answer: His rate (speed) was 16 km / hour

4. d=____________ s=____________ t=_____________
A salesman travelled at an average speed of 50 km/h for 2 hours 30 mins. How far did he travel?
d=____________
s=____________
t=_____________ D S T

5. Answer: He travelled 125 km
A salesman travelled at an average speed of 50 km/h for 2 hours 30 mins. How far did he travel? D S T
Distance =
Speed x Time
= 50 x 2•5
2 hour 30 mins
= 125 km
Answer: He travelled 125 km

6. d=____________ s=____________ t=_____________
A train travelled 555 miles at an average speed of 60 mph. How long did the journey take?
d=____________
s=____________
t=_____________ D S T

7. Answer: It took 9 hours 15 minutes
A train travelled 555 miles at an average speed of 60 mph. How long did the journey take? D S T
Distance
Speed
Time =
555 60 =
= 9•25 hours
= 9 hours 15 mins
Answer: It took 9 hours 15 minutes

8. Let’s try one together! d=____________ s=____________ t=_____________
A car travels along a road at a steady speed of 60 mph. How far will it travel in 6 hours?
d=____________
s=____________
t=_____________ D S T

9. You Try! d=____________ s=____________ t=_____________
A train covers a distance of 480 mi in 8 hours. If it travels at a constant speed, how fast is it traveling?
d=____________
s=____________
t=_____________ D S T

10. You Try! d=____________ s=____________ t=_____________
John walks at a steady speed of 3 mph. How long will it take him to travel 24 miles?
d=____________
s=____________
t=_____________ D S T

12. Your Turn to Teach!
Each partner set will have a teacher and a student. The teacher will explain to the student how to complete the chart below and help the student to solve for the variable.
Helen ran an 8-kilometer race in 52 minutes. What was her average speed?
d=____________
s=____________
t=_____________ D S T

13. SWITCH
Switch roles! Again, the teacher will explain to the student how to complete the chart below and help the student to solve for the variable.
A car goes 45 mph and travels for 200 miles. How many hours will it take for the car to reach its destination?
d=____________
s=____________
t=_____________ D S T