ABCD is an isosceles trapezium with vec(...

ABCD is an isosceles trapezium with `vec(AB) = 2 hati+10hat j +11 hatk` and `vec(AD)=-hati+2hatj+2hatk` If E is a point on side AB such that `AE : EB = 3 : 2`. If `A_1` and `A_2` are areas of trapezium ABCD and `triangleCDE` respectively then `A_1:A_2` equal to

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