SSC JE Civil Engineering 2017 Set 4 Solved Paper

A glass factory hires 11 craftsmen by paying eachof them Rs 1100 per day. The 12${}^{\mathrm{th}}$ craftsmandemands Rs 1200 per day. If this craftsman ishired then all other craftsmen must be padRs 1200. The marginal resource (labour) cost ofthe 12${}^{\mathrm{th}}$ craftsman is _______ .