ADVERTISEMENTIRB Infra Expects Margin To Remain 42% In Q4Construction Business Outperformance Aids IRB Infra NDTV Profit05 Feb 2019, 11:27 AM IST 05 Feb 2019, 10:36 AM IST05 Feb 2019, 11:27 AM ISTWhatsAppX (was Twitter)FacebookTelegramSaveIRB Infra Expects Margin To Remain 42% In Q4ADVERTISEMENT