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:

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

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

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

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

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

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

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

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

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

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

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