Question

Solve:
1. If 1/ 4 = a/12, then a = ?
2. if 5/a = 20/28, then a = ?
3. If a/3 = 4/6, then a = ?
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Answer 1

1)

$\sf \frac{1}{4} = \frac{a}{12} \implies \: 4a = 12 \: \implies a = \frac{12}{4} = 3$

Value of a = 3

2)

$\sf \frac{5}{a} = \frac{20}{28} \implies \: 140 = 20a \implies a = \frac{140}{20} = 7$

Value of a = 7

3)

$\sf \frac{a}{3} = \frac{4}{6} \implies 6a = 12 \implies a = \frac{12}{6} = 2$

Value of a = 2

Hope this will help u

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Answer 2

Step-by-step explanation:

1. If 1/4 = a/12

then, a = 1×12/4 { cross multiply}

=> a = 3

2. If 5/a = 20/28

then, 5 ×28 = 20 × a { cross multiply}

=> a = 5 ×28 /20

=> a = 7

3. If a/3 = 4/6

then, a = 4 × 3/6 {cross multiply}

=> a = 2

★_★