The limbs of a manometer consists of uniform capillary tubes of radii `1.44 xx 10^(-3)m` and `7.2 xx 10^(4 )m`. If the level of the liquid in the narrower tube stands 0.2 m above that in the broader tube, pressure difference between A and B is found to be `310lambda N//m^(2)`. Here `lambda` is an integer. Find `lambda` (density = `10^3 kg//m^3`, surface tension = `72 xx 10^(-3) N//m`). (take `g = 9.8 m//s^2`)