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प्रश्न
In the following figure, in ΔABC, DE || BC such that AD = 2.4 cm, AB = 3.2 cm and AC = 8 cm, then what is the length of AE?

बेरीज
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उत्तर
Since, DE || BC
∴ `(AD)/(DB) = (AE)/(EC)`
⇒ `2.4/(AB - AD) = (AE)/(AC - AE)`
⇒ `2.4/(3.2 - 2.4) = (AE)/(8 - AE)`
⇒ `2.4/0.8 = (AE)/(8 - AE)`
⇒ 3(8 – AE) = AE
⇒ 24 – 3AE = AE
⇒ 4AE = 24
⇒ AE = 6 cm
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