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Speed, Distance & Time

Speed, Distance & Time. Speed, Distance, Time Calculations. The aim of this lesson is to be able to use the correct formulas to calculate speed, distance or time. Reminder: How to change minutes into a decimal. 15 mins = 0• 25 hour So: 3 hours 15 mins = 3 • 25 hours.

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Speed, Distance & Time

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  1. Speed, Distance & Time Speed, Distance, Time Calculations

  2. The aim of this lesson is to be able to use the correct formulas to calculate speed, distance or time

  3. Reminder: How to change minutes into a decimal 15 mins = 0•25 hour So: 3 hours 15 mins = 3•25hours 30 mins = 0•5 hour So: 7 hours 30 mins = 7•5hours 45 mins = 0•75 hour So: 2 hours 45 mins = 2•75hours

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

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

  6. 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 2 hour 30 mins = 125 km Answer: He travelled 125 km

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

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