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Question
primary 6 | Maths
| Ratio
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Challenging..... please help..... Thanks.
Date Posted: 4 years ago
Views: 439
nos.
L: 3u
M: 5u
cost
L: 112.50+76.50 = 189
M: (301.50-76.50)/2 = 112.50
unit cost
L: 189/3u
M: 112.50/5u
189/3u = 112.50/5u + 0.90
(x3)
189/1u = 337.50/5u + 2.70
(x5)
945/1u = 337.50/1u + 13.50
945/1u - 337.50/1u = 13.50
945/1u - 337.50/1u = 13.50
607.50/1u = 13.50
1u = 607.50/13.50 = 45
(a)
L: 135
M: 225
(b)
one L costs $1.40
.
.
.
L: 3u
M: 5u
cost
L: 112.50+76.50 = 189
M: (301.50-76.50)/2 = 112.50
unit cost
L: 189/3u
M: 112.50/5u
189/3u = 112.50/5u + 0.90
(x3)
189/1u = 337.50/5u + 2.70
(x5)
945/1u = 337.50/1u + 13.50
945/1u - 337.50/1u = 13.50
945/1u - 337.50/1u = 13.50
607.50/1u = 13.50
1u = 607.50/13.50 = 45
(a)
L: 135
M: 225
(b)
one L costs $1.40
.
.
.
See 1 Answer
done
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Hope this helps
Date Posted:
4 years ago
Thanks a lot !
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