Speed, Distance, Time Calculations PowerPoint.pdfA train travelled 555 miles at an average speed of...
Transcript of Speed, Distance, Time Calculations PowerPoint.pdfA train travelled 555 miles at an average speed of...
Speed is how fast something is going or the distance something moves in a given amount of time.
Speed = distance
----------
time
Speed is measured in miles per hour
Speed is also measured in kilometers per hour
Measurement Unit
Speed Miles/Hour or Km/Hour
Distance Miles/Kilometers
Time Hours
Jack runs around the 1 mile track in 7 minutes. What is his speed?
- Speed is measured here in miles/hour
- How do we get 7 minutes into hours? - 7 minutes 1 hour
60 minutes
7/60 = .12 hours
The 3 formulas for Speed, Time & Distance:
Speed = Distance
Time Time =
Distance
Speed Distance = Speed x Time
Remember them from
this triangle:
D
S T
Solving for Speed Solving for Time Solving for Distance
D
S T
A windsurfer travelled 28 km in 1 hour 45 mins.
Calculate his speed.
Speed = Distance
Time
28
1.75 =
= 16 km/h
1 hour 45 mins
Answer: His speed was 16 km / hour
2 hour 30 mins
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
= 125 km
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 Time =
Distance Speed
555 60 =
= 9•25 hours = 9 hours 15 mins
Your dad traveled 75 miles in 2.5 hours. What was his speed?
30 miles/hour
Write your equation
Change your units
Fill in the info you know
Solve
Write proper units, circle your answer
Yolanda travels 240 kilometers in 4 hours. What was her average speed?
60 miles/hour
Write your equation
Change your units
Fill in the info you know
Solve
Write proper units, circle your answer