Question

1. Ifa: b= 7:5 and c:d=2a : 3b, then ac: bd is
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Answer 1

Answer:

$ac:bd= 14a:15b$

Step-by-step explanation:

$Given \: \frac{a}{b}=\frac{7}{5}\:---(1)\\\frac{c}{d}=\frac{2a}{3b}\:--(2)$

/* multiply equations (1) and (2), we get

$\frac{ac}{bd}=\frac{7}{5}\times \frac{2a}{3b}\\=\frac{14a}{15b}$

$\implies ac:bd= 14a:15b$

Therefore,

$ac:bd= 14a:15b$

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