Question

If ia:b 3:4 ,b:c 5:7 find a:c

Answer 1

Answer:

3:5

i hope it will help you

Answer 2

a:c=15:28

Step-by-step explanation:

$a:b=3:4$

$b:c=5:7$

$\frac{a}{b}=\frac{3}{4}$...(1)

$\frac{b}{c}=\frac{5}{7}$...(2)

Multiply equation (1) by equation (2)

$\frac{a}{b}\times \frac{b}{c}=\frac{3}{4}\times \frac{5}{7}$

$\frac{a}{c}=\frac{3\times 5}{4\times 7}$

$\frac{a}{c}=\frac{15}{28}$

$a:c=15:28$

Hence, the value of a:c=15:28

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