If the interior angles of a triangle are...

If the interior angles of a triangle are `15x^(@), 15(x+y)^(@)`, and `25y^(@)` and the relation between x and y is given by `5x-4y+2=0`, then what is the measure of the smallest angle of the triangle ?

A

`30^(@)`

B

`35^(@)`

C

`40^(@)`

D

`45^(@)`

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