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प्रश्न
In ΔABC, point D divides AB in the ratio 5:7, Find: DE, If BC = 4.8cm
उत्तर
Considering DE || BC
Since DE || BC
`"AD"/"AB" = "DE"/"BC"`
⇒ `(5)/(12) = "DE"/(4.8)`
⇒ DE = `(5 xx 4.8)/(12)`
⇒ BC = 2cm.
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