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primary 6 | Maths
| Fractions
2 Answers Below
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Difficult to understand and figure out! Pls help
Date Posted: 6 years ago
Views: 844
Unit/part method.
Let the cost each person has to pay be 2 units.
Bala only paid half. So he paid 1 unit.
Ailing & Cindy helped Bala pay the remaining 1 unit.
So total Ailing and Cindy paid
= 2 units + 2 units + 1 unit = 5 units.
Ratio Ailing paid to Cindy paid
= 3 : 4
Means Ailing paid 3 parts.
Cindy paid 4 parts.
Total they paid = 3 + 4 = 7 parts.
So 5 units = 7 parts.
1 unit = 7/5 parts.
Cindy only has to pay 2 units actually.
2 units = 7/5 parts x 2
= 14/5 parts
= 2 4/5 parts.
But she paid 4 parts in total.
4 parts - 2 4/5 parts
= 1 1/5 parts
= 6/5 parts
So this means the amount she paid for Bala = 6/5 parts = $24
1/5 parts = $24 ÷ 6 = $4
Since you know 2 units = 14/5 parts,
2 units = $4 x 14 = $56
Each person 2 units, so total
= 2 units x 4 = 8 units
= $56 x 4 = $224
Let the cost each person has to pay be 2 units.
Bala only paid half. So he paid 1 unit.
Ailing & Cindy helped Bala pay the remaining 1 unit.
So total Ailing and Cindy paid
= 2 units + 2 units + 1 unit = 5 units.
Ratio Ailing paid to Cindy paid
= 3 : 4
Means Ailing paid 3 parts.
Cindy paid 4 parts.
Total they paid = 3 + 4 = 7 parts.
So 5 units = 7 parts.
1 unit = 7/5 parts.
Cindy only has to pay 2 units actually.
2 units = 7/5 parts x 2
= 14/5 parts
= 2 4/5 parts.
But she paid 4 parts in total.
4 parts - 2 4/5 parts
= 1 1/5 parts
= 6/5 parts
So this means the amount she paid for Bala = 6/5 parts = $24
1/5 parts = $24 ÷ 6 = $4
Since you know 2 units = 14/5 parts,
2 units = $4 x 14 = $56
Each person 2 units, so total
= 2 units x 4 = 8 units
= $56 x 4 = $224
Ans is $224
Made a small error. Check the edited working above.
Thank you!
See 2 Answers
done
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The other person made careless mistakes.
Date Posted:
6 years ago
done
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Hope this helps.
Date Posted:
6 years ago
Ans shld be $224
If Bala had 5 units at first and only paid 1 unit, how is that half...
You have a big misconception from the ans u gave. 1/2 of his share does not mean 1/2 in the 2nd ratio u gave. 3:4 is the ratio of A:C. They should not be combined with the 0.5 like that. If you multiplied the ratio by 5, B should have paid 2.5. The rest of the 2.5 was shared between A and C. Therefore amt A and C paid in total would be 5 units ×2 + 2.5units= 12.5units. 12.5 units would then be represented by the ratio 3:4.
Thus, there is no point multiplying the ratio. As it would make the numbers big and complicate the question. If you dont understand, look at the solution given in the comment by the other person or the one i wrote out.
Thus, there is no point multiplying the ratio. As it would make the numbers big and complicate the question. If you dont understand, look at the solution given in the comment by the other person or the one i wrote out.
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