A vessel contains two immisible liquids of density `rho_(1) = 1000 kg m^(-3)` and `rho_(2) =1500 kg m(-3)`. A solid block of volume V=`10m^(3)` and density d = `800 kg m^(-3)` is tied to on end of a string and other end is tied to the bottom of the vessel. The block is immersed with `2//5^(th)` of its volume in the liquid of higher density and `3//5^(th)` in the liquid of lower density. The entire system is kept in an elevator which is moving upwards with an acceleration ao a = g/2. The tension in the string is (take g = `10 m s^(-2)`).

Answer

`6N`