Question #21

Friday, November 6, 2009

The first thing you have to do is find how fast Andrew was going. To find out you have to Divide how long he drove by the hours. So you have to divide 234 by 3. You will get 78.

Andrew's average speed is 78 km/h. Brian drove 5 km/h faster then Andrew. So it would be 
78+5 =83 km/h.

Now we have to find out how much time Brian took to get from Dawson to Mayo. So its 234 divided by 83. And it equals 2.819277108.

So the 2 means 2 hours. We will keep the 2 aside for now and worry about the 0.819.

0.819 x 60 = 49.14
60 - 49.14 = 10.86
And because it said round to the nearest minute...
And the answer is 11 minutes!
So Brian took 11 less minutes than Andrew.


kristin9-05 said...

Nice post Vikram! You explained everything really clearly. Though it might be a nice idea if you wrote something like "Brian took 11 less minutes than Andrew" just to make it clear. But good job!

Lissa 9-05 said...

Good job Vikram! Your post is very neat and you bolded and coloured the important numbers. I agree with Kristin that you should end the problem with a sentence. Keep it up! (:

Marc905 said...
This comment has been removed by the author.
Marc905 said...

Great Post you made there. Very well done and yeah you should've also added a sentence to the end of the problem. That's a really good idea to remember on a test.

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