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In the figure given below , overline(ED)...

In the figure given below , `overline(ED)||overline(AB)andoverline(EF)||overline(BC)`. If `angleFED=40^(@)andangleDEC=20^(@)` , then the angle made by `overline(BC)` at the centre is _______.

A

`20^(@)`

B

`40^(@)`

C

`60^(@)`

D

`80^(@)`

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The correct Answer is:
B
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