The following results were obtained during kinetic studies of the reaction ;
2A + B $ \to $ Products

Experiment	[A] (in mol L$-$1)	[b] (in mol L$-$1)	Initial Rate of reaction (In mol L$-$1 min$-$1)
I	0.10	0.20	6.93 G 10$-$3
II	0.10	0.25	6.93 G 10$-$3
III	0.20	0.30	1.386 G 10$-$2

The time (in minutes) required to consume half of A is :