Unit 9 · Speed and Time Calculation
Slow Bus to Hilltown — When Must It Leave?
Lesson 4 of 9
About this lesson
Speed and Time problems are a core component of OC Thinking Skills — and the single most valuable insight in this entire unit is that if something travels at twice the speed, it takes exactly half the time. Once you hold that idea firmly, these questions become fast and reliable marks.
Chapters
Question
A slow bus travels from Lakeside to Hilltown in 4 hours. A fast coach covers the same route at twice the speed of the bus.
On a certain day the coach leaves Lakeside at 2:00 pm and arrives in Hilltown at 4:00 pm.
At what time would the slow bus have to leave Lakeside to reach Hilltown by 4:00 pm?
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