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`DeltaABC` में भुजा `AB` तथा `BC` पर दो बिंदु D तथा E इस प्रकार है कि `DE||AC` तथा `AD:BD=3:2` समलम्ब `ACED` तथा `DeltaBED` के क्षेत्रफल का अनुपात ज्ञात करें?
A. `4:15`
B. `15:4`
C. `4:21`
D. `21:4`

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`:.DE||AC`
`:. DeltaBDE~DeltaBAC`
`(ar(BDE))/(ar(BACत्र)=(2^(2))/(5^(2))=4/25`
`ar(“trap”.ACED)=ar(BaC)-ar(BDE)`
`=25-4=21`
`:.(ar(ACED))/(ar(BDE))=21/4=21:4`

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