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Another maths question.
Try this one, then.
A rabbit and a cat together weigh 10 kg The rabbit and a dog together weigh 20 kg. The cat and the dog together weigh 24 kg. What would be the weight of the three together? (Disclaimer: "weight" ought, really, to read "mass".) |
27
1. R + C = 10 2. R + D = 20 3. C + D = 24 Re-arrange 1: C = 10 - R Solve into 3: 10 - R + D = 24 D - R = 14 D = R+14 Solve into 2: R + R + 14 = 20 2R = 6 R = 3 Solve back into 1: 3 + C = 10 C = 7 Solve back into 3: 7 + D = 24 D = 17 Total : 17 + 7 + 3 = 27 |
Originally Posted by alcazar
(Post 11738528)
Try this one, then.
A rabbit and a cat together weigh 10 kg The rabbit and a dog together weigh 20 kg. The cat and the dog together weigh 24 kg. What would be the weight of the three together? (Disclaimer: "weight" ought, really, to read "mass".) Cat weighs 7kg Rabbit weighs 3kg Dog weighs 17kg Total is therefore 27kg Cheers Steve |
Er.. add them all together and you have the combined weight of 2 of each = 54kg which means the combined weight of one of each is 27kg
Is this difficult? :confused: |
No, just interesting, so far I've seen two ways to do it and neither was the way I did it.
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Originally Posted by SJ_Skyline
(Post 11738531)
27
1. R + C = 10 2. R + D = 20 3. C + D = 24 Re-arrange 1: C = 10 - R Solve into 3: 10 - R + D = 24 D - R = 14 D = R+14 Solve into 2: R + R + 14 = 20 2R = 6 R = 3 Solve back into 1: 3 + C = 10 C = 7 Solve back into 3: 7 + D = 24 D = 17 Total : 17 + 7 + 3 = 27 English math:lol1: took me 5s to read this **** and have an answer(do not even start read 3rd line) |
Originally Posted by fawor
(Post 11738608)
English math:lol1:
took me 5s to read this **** and have an answer(do not even start read 3rd line) Math is an Americanism. |
Originally Posted by f1_fan
(Post 11738538)
Er.. add them all together and you have the combined weight of 2 of each = 54kg which means the combined weight of one of each is 27kg
Is this difficult? :confused: I'm with "Rachel Riley" here on this one that's how I did it!!!! Extra points to Skyline - my maths teacher beat it in to us to always show your 'workings out' to get full points for the question! |
Originally Posted by tarmac terror
(Post 11738641)
I'm with "Rachel Riley" here on this one that's how I did it!!!!
Extra points to Skyline - my maths teacher beat it in to us to always show your 'workings out' to get full points for the question! In hindsight I would go with F1's answer as that's by far the most simple, but I'll take an extra point when offered. ;) |
I think the cat needs to lose some weight.
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LOL, I thought someone might say that.
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Bloody big cat at 7kg
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It's a virtual cat...it exists only so we can have a question about it.
:D |
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