A car travels at 65 mph for 4 hours. How far does it go?: animated lesson
A narrated, step-by-step word problems video lesson with captions. Final answer: Distance = 260 miles.
Video with a synthetic English voice and captions. Pick another language for subtitles in that language, or open the interactive version.
Video narrated by a synthetic voice (Piper TTS, en_US-ljspeech-high voice (LJ Speech dataset, public domain)); the steps come from our maths engine and the answer was checked independently. Download MP4 (0.4 MB) · Captions (WebVTT)
Steps on screen
- 1. The problemWorked exampleA car travels at 65 mph for 4 hours. How far does it go?
- 2. Steps, part 1
- Read the problem
- Identify the known values
- Write the equation
- Solve for d
- 3. Steps, part 2
- Result
- 4. The answer
d = 260
- 5. Check
- Substituting d = 260 back into d = r · t balances both sides ✓
Transcript
The problem. Here is the problem: A car travels at 65 mph for 4 hours. How far does it go? Speed 65 mph, time 4 hours; the distance is unknown. Distance equals rate times time; r equals 65, t equals 4; solve for d.
Steps, part 1. Read the problem. Speed 65 mph, time 4 hours; the distance is unknown. Identify the known values. Distance equals rate times time. Known: r equals 65, t equals 4. Unknown: distance (d). Write the equation. d equals r times t. Solve for d. d equals r times t equals 65 times 4.
Steps, part 2. Result. d equals 260.
The answer. So the answer is Distance equals 260 miles. Substitute the known values into d equals r times t and isolate d. Keep units consistent (for example miles, miles per hour and hours).
Check. Substituting d equals 260 back into d equals r times t balances both sides, which checks out.
About word problems
Turn everyday situations about prices, speed, ages and interest into equations and solve them.
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