Laugh : Joy : : Weep : ?
A cinema hall has equidistant rows 1 m apart. The length of the cinema hall is 287 m and it has 287 rows. From one side of the cinema hall, laughing gas (N2O) is released and from the other side, tear gas (C6H5COCH2Cl) is released. In which rows, spectators will be laughing and weeping simultaneously?