MATHS HOMEWORK FOR A 12 YEAR OLD

[Softus]

Surely that answer would have marks deducted for unnecessary working?

 

[blondini]

Often less is more but sometimes it's just not enough

 

[Shutpa]

I don't understand why you think that the slower boat will travel different distances on the different crossings.

It's because the faster boat is going at a greater speed and therefore meets the slower one 300m before (ie 650m-350m) the first passing. If they were to continue crossing to and fro, they would end up going in the same direction with the faster boat overtaking the slower one.

 

[Shutpa]

Surely that answer would have marks deducted for unnecessary working?

Working must be shown!

 

[tim west]

Hasnt anyone ever measured a wall or floor from both ends to find a centre point? First you measure to your guess at whats the centre or where your rule runs out say 3m and make a mark then measure 3m the other way (or up to the previous mark) and make another mark then measure the difference and use that to determine the centre.

 

[Trazor]

the fast boat will have a speed of 146.153846m/min.

the fast boat will also have been in motion for 19.5min. It will therefore have travelled a total of 1950m

I think you will find 146.153846m/min x 19.5 equals .....2850M.

 

[blondini]

the fast boat will have a speed of 146.153846m/min.

the fast boat will also have been in motion for 19.5min. It will therefore have travelled a total of 1950m

I think you will find 146.153846m/min x 19.5 equals .....2850M.

Yeah 2850m is the correct figure. Add on the remaining 350 and you complete the second crossing.

It's been one of those days...

 

[empip]

Bolo, the real thing ....

Look into the future ...

 

[Shutpa]

Bolo, the real thing ....

Untitled

• empip
• 6 Feb 2009
• 1

If I could read it, I might agree. Could I have an enlarged copy please?

 

[empip]

Does that save a mouse click or so?

BTW this is no proof that all velocities or waiting times will oblige 'cause they will not. merely the problem set by Old Sam himself... For a particular set of circumstances....

 

[Alison556]

The best answer I got from a friend was that it was a job for quadratic equations - but other than that, she can't remember how to work it out!!!!

So still no answer.

Bolo, if your kid doesn't give us the answer, I'm afraid I will have to make serious threats against him!!!!

 

[tim west]

pip we know you are a maths genius on this forum and probably did calcs like above as a twelve year old but I cant quite see your run of the mill twelve year old doing that sort of number crunching

 

[blondini]

So still no answer.

<NooYoik accent> We don't need no answer from the kid. We got the answer already Lady.

 

[Alison556]

But which answer is the right answer? I got lost about 4 pages ago!!!

 

[tim west]

I gave up the will to live 2 pages ago