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प्रश्न
In ΔABC, point D divides AB in the ratio 5:7, Find: BC, If DE = 2.5cm
उत्तर
Considering DE || BC
Since DE || BC
`"AD"/"AB" = "DE"/"BC"`
⇒ `(5)/(12) = (2.5)/"BC"`
⇒ BC = `(2.5 xx 12)/(5)`
⇒ BC = 6cm.
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