Fast-moving consumer goods (FMCG) companies are expected to witness pressure on volumes in the October-December quarter. However, price hikes will help push up revenues, said brokerages.For India's largest engineering firm, Larsen and Toubro (L&T), the analysts expect a 20 per cent growth in consolidated revenue, and an 8.1 per cent core business Ebitda margin, up 40 bps from a year ago.