That was a very challenging problem, especially as we haven’t done a lot of similar tests at school. I’ve spent an hour with my dad 🙁 in order to understand how it’s solved and that’s what we came up with:
Initally, A=B+950
After transfusing 250mls from A to B, A becomes 250mls smaller and B 250mls larger, so – at that point: A = B + 450 (1)
At that point, we also know that A/B=5/2, so A/B=2.5, so A = 2.5B (2)
Combining (1) and (2), we get:
A = B + 450 2.5B = B + 450 2.5B – B = 450 1.5B = 450 B = 450/1.5 B = 300mls
That’s B after it’s been transfused with 250mls extra, so the initial B = 50mls
The answer is 30ml because
950-250=700.
700= 5x.
1x=140.
2x=280
So 280- 250=30
That was a very challenging problem, especially as we haven’t done a lot of similar tests at school. I’ve spent an hour with my dad 🙁 in order to understand how it’s solved and that’s what we came up with:
Initally, A=B+950
After transfusing 250mls from A to B, A becomes 250mls smaller and B 250mls larger, so – at that point: A = B + 450 (1)
At that point, we also know that A/B=5/2, so A/B=2.5, so A = 2.5B (2)
Combining (1) and (2), we get:
A = B + 450 2.5B = B + 450 2.5B – B = 450 1.5B = 450 B = 450/1.5 B = 300mls
That’s B after it’s been transfused with 250mls extra, so the initial B = 50mls
I think you mean transferring not transfusing.
I’m so proud of you Elpida for working so hard on this and using your growth mindset!
A = B + 950
A – 250 = B + 1200
A – 250:B + 1200 = 5:2
B + 1200 = 2.5 B
250% B = 1200
0.4 (1200) = B
(4) 120 = B
B = 480 ml
I can FINALLY understand this question! Thanks, Adi!
I wonder who is right since we all got different answers.
Mr Burns of the tennis maths challenge you gave us on Tuesday do we have to complete it
Do as much as you can, Sa,. Thanks