For a chemical reaction $A+B\to$ Product, the order is 1 with respect to A and B

Rate mol $L^{-1}{S}^{-1}$	[A] mol $L^{-1}$	[B] mol $L^{-1}$
0.10 0.40 0.80	20 X 40	0.5 0.5 y

Which is the value of x and y?

Given order is one with respect to both A & B, then as rate is increased four times when conc of B is constant then conc of ‘A’ increases by four times. X=80 mol $l^{-}$$t^{-}$  as conc of A becomes half, but rate is doubled means, rate change is four times w.r.to B. That means B conc increases by four times