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Old 21st September 2013, 03:12 AM   #1 (permalink)
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Maths Problem n Solution Needed

!) The length of three pieces of ropes is in the ratio 4: 7: 3. What is the difference in length between the shortest and the longest rope if the total length of the three ropes is 91m?


2) The figure below is made up of a triangle and a rectangle. The area of the triangle is 1/3 the area of the rectange. Given that 2/5 of the triangle is shaded, what fraction of the whole figure is unshaded? Give your answer in its simplest form.

}---------------------------------|
} ]
| |
] rectangle /\ }
] ______________/_\ __}
/ \
/ \
------------

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Last edited by Roshida; 21st September 2013 at 03:15 AM. Reason: typo error - diagram should show a triangle with tip inside rect.
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Old 23rd September 2013, 12:30 AM   #2 (permalink)
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Re: Maths Problem n Solution Needed

For part 1. The total length is 4+7+3=14 units, which is equal to 91m. The difference between the longest and shortest length = 7-3=4 units, which is equal to (91/14)*4 = 26m.

For part 2, I dont understand what you are drawing, and I doubt anyone will do. And your unshaded area is inclusive of the area of rectangle also?

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Old 9th July 2014, 04:11 PM   #3 (permalink)
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Re: Maths Problem n Solution Needed

Yes the correct answer is 26m for first question. It is simple math problem and if you want you can check these types of problems online itself at any math homework help answers.

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Old 29th October 2014, 02:18 PM   #4 (permalink)
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Re: Maths Problem n Solution Needed

Correction but first question answer should be 28m as 7metres multiplied by 4 units is 28 metres,not 26 metres.

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Old 29th October 2014, 04:01 PM   #5 (permalink)
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Re: Maths Problem n Solution Needed

Originally Posted by MapPwner View Post
Correction but first question answer should be 28m as 7metres multiplied by 4 units is 28 metres,not 26 metres.
91/14 is 6.5.. 6.5 times 4 is 26.

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Old 29th October 2014, 05:37 PM   #6 (permalink)
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Re: Maths Problem n Solution Needed

Oh shucks I suck at mental sums...PAISEH

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