# The 3 formulas for Speed Time Distance Distance

• Slides: 13

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

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

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

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

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

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

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

Let’s try one together! 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! 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! 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 • d=______ • s=______ T 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 • d=______ • s=______ S • t=_______ T