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CAHSEE Math Videos 210 videos
Statistics, Data, and Probability I: Drill Set 1, Problem 1. What is the mean yearly salary?
Statistics, Data, and Probability I: Drill Set 1, Problem 2. What is the median length of these writing utensils?
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CAHSEE Math 2.2 Measurement and Geometry 184 Views
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Description:
Measurement and Geometry Drill 2 Problem 2. If Sarah is required to swim three lengths of this pool, how far, to the nearest foot, will she need to swim?
Transcript
- 00:03
Here's a question to give your brain a solid shmooping...
- 00:06
Sarah is taking swim lessons from Aquaman in a swimming pool with a length of 50 meters.
- 00:12
If Sarah is required to swim three lengths of this pool, how far, to the nearest foot,
- 00:17
will she need to swim? Hint: 1 meter is approximately 1.083 yards.
- 00:24
And here are the potential answers:
Full Transcript
- 00:32
OK, this is a standard conversion question-- meters to feet...
- 00:36
...with the wild and crazy tricky curveball thrown in there that she's swimming 3 laps.
- 00:41
Ooh. Brutal. Aquaman is apparently a very demanding instructor.
- 00:45
So we need to convert 150 meters into uh... how many feet?
- 00:50
Just rounding and assuming we don't have a calculator or an iPhone or a geeky kid handy
- 00:54
to do the math in his head...we can figure this one out fast.
- 00:58
A meter is roughly 1.1 yards -- i.e. a meter is a bit longer than a yard.
- 01:03
So it makes sense that the number of yards would be a bit longer...
- 01:07
and if it was exactly 1.1 times longer...
- 01:10
...we could multiple the 150 meters by 1.1 to get roughly 165 yards...
- 01:16
...but they want the ANSWER in feet -- so multiply that 165 by 3 and we get 495...
- 01:24
...which is close enough to 487 for military work.
- 01:28
The answer is D.
- 01:29
As in... "Dweller of the Depths"
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