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Question
primary 5 | Maths
| Whole Numbers
2 Answers Below
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I dun understand
Date Posted: 5 years ago
Views: 307
2 shirts cost as much as 5 caps
You can assume that 5 caps = 2 shirts so 10 shirts = 4 caps
7 shirts and 10 caps cost $275
7 shirts and 4 shirts cost $275
11 shirts cost $275
1 shirt costs $275/11 = $25
You can assume that 5 caps = 2 shirts so 10 shirts = 4 caps
7 shirts and 10 caps cost $275
7 shirts and 4 shirts cost $275
11 shirts cost $275
1 shirt costs $275/11 = $25
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Let S be the cost of 1 shirt, C be the cost of 1 cap. We must try to eliminate either S or C from the equations, so that we can find the remaining (either S or C) easily. Here, we know that 2S=5C, since 2 shirts cost as much as 5 caps. By simply multiplying this eqn by 2, we get 4S=10C, and 10C is also present in the next equation, 7S+10C=275. Replace the 10C with 4S to get an equation with only S.
Date Posted:
5 years ago
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Ans: $25
Date Posted:
5 years ago
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