Boeing stretches boundaries of travel
Such an article can provide the opportunity for reinforcement of basic numeracy in a real context including such things as decimals, fractions and place value. The opportunity also exists to introduce a basic equation, speed = distance /time, and how to manipulate it to gain the results required. We can use limited information to complete the picture.
The speed of sound (Mach 1) = 331 metres/sec or
331 * 60 =19860 metres/min
19860*60 = 1191600 metres/hr
1191600/1000 = 1191.6 km/hr
Mach .95 = 1191.6 * .95 = 1132 km/hr
Once we know the proposed new jet's speed we can determine that of the 747. New jet @ 1132 km/hr saves approximately 1 hr every 4825 km/in travelled when compared with that of the 747.
distance/speed = time new jet, 4825/1132 = 4.26 hrs
Add one hour for 747, speed = distance/time s = 4825/ 5.3
Speed of 747 = 910 km/h (approximately)
This can be extended by asking:
The opportunity exists to express this visually with graphs.
One should also consider the SOSE aspects, as in the first question for students. For example:
Other areas of potential interest.
(Written by Leigh Price, BTeach student, University of Tasmania,
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