Figure shows two blocks in contact and sliding down the inclined surface of inclination 30∘. Coefficient of friction between the block of mass 4 kg and the inclined plane is μ1=0.3 and that between the block of mass 2 kg and the inclined plane is μ2=0.20. Assume coefficients of static and kinetic friction to be equal. Find the acceleration of 2 kg block. Take g=10 m/s2.