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Question
primary 6 | Maths
| Ratio
2 Answers Below
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Cannot use guess and check. Please help.
Date Posted: 3 years ago
Views: 324
Use ratio
A:B
25:14
-2u:-1u
1:2
Therefore,
25-2u / 14-1u = 1/2
50-4u = 14-1u
50-14 = 4u-1u
36 = 3u
U = 12
Alice spend =2u = 2×12 = 24
A:B
25:14
-2u:-1u
1:2
Therefore,
25-2u / 14-1u = 1/2
50-4u = 14-1u
50-14 = 4u-1u
36 = 3u
U = 12
Alice spend =2u = 2×12 = 24
Alice spend : ★★
Alice left : ■
Alice total : ★★ ■ →$25
Bernice spend : ★
Bernice left : ■ ■
Bernice total = ★ ■ ■ →$14
Alice and Bernice altogether :
$25 + $14 = $39
= ★★★■■■ = ★■★■★■
So ★■ = $39 ÷ 3 = $13
Since Alice total = $25 = ★★■,
★ = $25 - $13 = $12
Alice spend = ★★ = $12 × 2 = $24
Alice left : ■
Alice total : ★★ ■ →$25
Bernice spend : ★
Bernice left : ■ ■
Bernice total = ★ ■ ■ →$14
Alice and Bernice altogether :
$25 + $14 = $39
= ★★★■■■ = ★■★■★■
So ★■ = $39 ÷ 3 = $13
Since Alice total = $25 = ★★■,
★ = $25 - $13 = $12
Alice spend = ★★ = $12 × 2 = $24
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