1. Rate-Time-Distance Problems
Section 4.8
Rate-Time-Distance Problems

2. Uniform Motion Problems
What is uniform motion?
Motion without a change in speed/rate
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3. Three Types of Problems
Type of Problem Key to Solving
Opposite Direction (toward or away) Distances add to a total.
Same Direction (catch-up) Distances are equal.
Same Direction (two-part trip) Distance add to a total.
Round Trip Distances are equal.
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Example 1 Bicyclists Brent and Jane started at noon from points 60 km apart and rode toward each other, meeting at 1:30 PM. Brent’s speed was 4 km/hr greater than Jane’s speed. Find their speeds.
What type of problem is this? Add or Equal?
Rate X
Time=
Distance
Brent
Jane
Equation: (see text book)
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Example 2: A helicopter leaves Central Airport and flies north at 180 mi/hr. Twenty minutes later a plane leaves the airport and follows the helicopter at 330 mi/hr. How long does it take the plane to overtake the helicopter?
What type of problem is this? Add or Equal?
Rate X
Time=
Distance
Helicopter
Plane
Equation: (see text book)
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Example 3: A ski lift carried Maria up a slope at the rate of 6 km/hr, and she skied back down parallel to the lift at 34 km/hr. The round trip took 30 minutes. How far did she ski and for how long?
What type of problem is this? Add or Equal?
Rate X
Time=
Distance Up
Down
Equation: (see text book)
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Assignment
SEE SYLLABUS
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