IF DeltaABC~DeltaDEF and area (DeltaABC)...

IF `DeltaABC~DeltaDEF` and area (`DeltaABC`): area (`DeltaDEF`)=49:100.
Then DE:AB=………..

A

0.38194444444444

B

0.42152777777778

C

0.42291666666667

D

0.29861111111111

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