Larsen & Toubro (L&T), the multinational conglomerate which is also the country’s largest engineering and construction company, says profit in the March quarter fell seven per cent, due to a sharp rise in interest cost.Despite a weak investment climate, it exceeded its order inflow target. The company reported Rs 1,788 crore net profit for the quarter, the fourth one in 2012-13, as against Rs 1,920 crore for the same period last year. The stock fell 5.6 per cent to Rs 1,517 on Wednesday, as the result was below Street estimates. Analysis: Larsen & Toubro's bonus beats logic A M Naik, the executive chairman, said the company would overcome the challenges because of its diversified portfolio and increased expansion in international markets. The company expects a 20 per cent increase in order intake and 15-16 per cent rise in revenue for 2013-14. In FY2013, L&T got orders worth Rs 88,000 crore.