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प्रश्न
20 m : 70 m = Rs 8 : Rs ______.
उत्तर
20 m : 70 m = Rs 8 : Rs 28.
Explanation:
`(20 m)/(70 m) = (Rs 8)/(x("let"))`
⇒ `20/70 = 8/x`
⇒ `20 xx x = 70 xx 8` .....[By cross-multiplication]
⇒ `x = (70 xx 8)/20` = 28
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