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 CSS Forums IB Paper, 2013

#21
Friday, July 05, 2013
 Senior Member Join Date: Dec 2009 Location: SARGODHA Posts: 162 Thanks: 92 Thanked 48 Times in 38 Posts

Quote:
 Originally Posted by Syeda Bukhari How 240? Please help me understand so I may not make that mistake in future. 96. Its Cosmogony for sure.
well it Says a bridge is to be constructed on a 120 metEr LONG RIVER....n 2 quarter, each on either side....1 quarter on either side of bridge not the river length IMHO....so if 2 quarters make 120m other two on EITHER sides should b 60 each hence making it 240;

96. Its Cosmogony for sure.[/QUOTE]

looking at options it seems option was COSMOGONY, you are right! There wasn't any option like cosmology, my bad! i thought it was cosmology,i did pick that option nevertheless
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Last edited by Syeda Bukhari; Friday, July 05, 2013 at 06:17 PM. Reason: Merged/Chain posts
 The Following 2 Users Say Thank You to zia bugvi For This Useful Post: Sabir Basheer (Friday, July 12, 2013), Syeda Bukhari (Friday, July 05, 2013)
#22
Saturday, July 06, 2013
 Senior Member Join Date: Mar 2012 Location: FAISALABAD Posts: 669 Thanks: 288 Thanked 228 Times in 163 Posts

Quote:
 Originally Posted by gorchani River wale question ka answer 240 tha as equation will be as follows Let x be the length of the bridge than x/4 + x/4 +120 = x x+x+120*4= 4x x=240 question was tricky as we had to take the length of the bridge (not the length of river 120 which was 30 m )
you do not understand the question clearly.its ans is 180
120 total.
one side quater 30
2nd side quarter 30
after that you make total; 180
ab to question tek sa yaad nai hai but es ka ans 180 he hai.
plz read the question 2 or 3 times then solve it.mostly students post math question without logic.plz add solutions.
#23
Saturday, July 06, 2013
 Senior Member Join Date: Jul 2010 Posts: 108 Thanks: 2 Thanked 34 Times in 28 Posts

Quote:
 Originally Posted by musmanhussain you do not understand the question clearly.its ans is 180 120 total. one side quater 30 2nd side quarter 30 after that you make total; 180 ab to question tek sa yaad nai hai but es ka ans 180 he hai. plz read the question 2 or 3 times then solve it.mostly students post math question without logic.plz add solutions.
A bridge is built across the river. The river is 120 meters wide. One quarter of the bridge is over the left river bank and one quarter of the bridge is over the right river bank. How long is the bridge?
a. 150 m b. 180 m c. 210 m d. 240 m
This is the exact statement and answer comes out to be 240 m... Option D had no 'm' (Unit metre) in it...
 The Following User Says Thank You to suhaibqaisar For This Useful Post: Sabir Basheer (Friday, July 12, 2013)
#24
Sunday, July 07, 2013
 E M P O W E R Join Date: Feb 2011 Location: Imaginary Sphere Posts: 811 Thanks: 232 Thanked 619 Times in 350 Posts

Statement:

A bridge is built across the river. The river is 120 meters wide. One quarter of the bridge is over the left river bank and one quarter of the bridge is over the right river bank. How long is the bridge?

Correct choice:

240m

How?

Those who say 180m are making quarters of 120m, well that is not right. Statement says that two quarters are exactly above the soil while other two are exactly above the wet-length or wideness of the river. And this wideness is given as 120m. 120m makes two quarters so one quarter will be 60m and that gives a total of 240m.
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#25
Monday, July 08, 2013
 Senior Member Join Date: Dec 2011 Location: Larkana Posts: 483 Thanks: 5 Thanked 286 Times in 180 Posts

(1/4 into 120 = 30) + (1/4 into 120 + 30)
120+30+30=180
As per Mathematics rules according to four fundamental binary operations together to find any value we require all the values except the one which is tobe found.
For example; 3x+2=3(4)+2, here we can find the value of x.

Have you ever seen any bridge that is half built on river and half on ground???
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#26
Monday, July 08, 2013
 E M P O W E R Join Date: Feb 2011 Location: Imaginary Sphere Posts: 811 Thanks: 232 Thanked 619 Times in 350 Posts

Quote:
 Originally Posted by Raja Bahar Have you ever seen any bridge that is half built on river and half on ground???

So you want to say that the bridge starts from the edge of the river bank?
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#27
Friday, July 12, 2013
 Senior Member Join Date: Aug 2010 Posts: 120 Thanks: 53 Thanked 73 Times in 37 Posts

39. Fuel wood logs sawed 53 times and 72 pieces made. If the cutter saw only one at a time how many there were before cutting?
please tell the answer of this question and how we can find the solution. I could not understand the question.
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#28
Monday, August 26, 2013
 Junior Member Join Date: Aug 2013 Location: Lahore Posts: 29 Thanks: 5 Thanked 3 Times in 3 Posts

But its much more good for us if you mention remaining options.
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