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primary 6 | Maths
| Ratio
One Answer Below
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Actually not ratio but a random question. Like to horoscope booklets with questions that doesn't mks my sense. Pls help. I still got more questions to ask cause Idk. Help plss. Thanks in advance
Date Posted: 5 years ago
Views: 324
Amount she paid for 2kg of sugar from shop A = $0.90 x 2 = $1.80
Since the average she paid was only 78 cents per kg,
$0.78 x 2 = $1.56
$1.80 - $1.56 = $0.24
We can see this as $0.24 was transferred from the cost of sugar bought from shop A to the cost of sugar from shop B,to make the cost 'go up' from 70 cents to 78 cents per kg.
$0.78 - $0.70 = $0.08
$0.24 ÷ $0.08 = 3
So 3 kg of sugar was bought from shop B.
(Check :
Actual cost of sugar from shop B
= 3kg x $0.70per kg
= $2.10
Total cost of sugar from both shops
= $2.10 + $1.80
= $3.90
Average cost of sugar = $3.90 ÷ (2kg +3kg)
= $3.90 ÷ 5kg
= $0.78 per kg
Since the average she paid was only 78 cents per kg,
$0.78 x 2 = $1.56
$1.80 - $1.56 = $0.24
We can see this as $0.24 was transferred from the cost of sugar bought from shop A to the cost of sugar from shop B,to make the cost 'go up' from 70 cents to 78 cents per kg.
$0.78 - $0.70 = $0.08
$0.24 ÷ $0.08 = 3
So 3 kg of sugar was bought from shop B.
(Check :
Actual cost of sugar from shop B
= 3kg x $0.70per kg
= $2.10
Total cost of sugar from both shops
= $2.10 + $1.80
= $3.90
Average cost of sugar = $3.90 ÷ (2kg +3kg)
= $3.90 ÷ 5kg
= $0.78 per kg
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Someone answered alr so I want to post another question that my whole family don't know yes legit. This is a big case people pls help look for my question people.
Date Posted:
5 years ago
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