The correct answer is 1730 km.

• The first electric train ran in India with the inauguration of services between Bombay VT and Kurla Harbour on 3rd Feb 1925 on the ex-GIP Railway system.
• The section was electrified on 1500 Volt DC.
• Electric traction was subsequently extended on Central Railway up to Igatpuri on the Northeast line and Pune on the Southeast line.
• In the post Independence era, the work of electrification of Howrah - Burdwan section of Eastern Railway taken up on 3000 Volt DC during the Period of 1st Five year Plan was completed in 1958.
• Production of Electric locomotives was simultaneously taken up indigenously at Chittaranjan Locomotive Works (CLW) in 1960 and the first 1500 V DC electric locomotive for Bombay Area Lokmanya was flagged off in1961 by Pt. Jawahar Lal Nehru.
• During 2015-16, Indian Railways completed the electrification of 1730 km.
• Railway electrified 45,881 Route kilometers (RKM) which is about 71% of the total Broad-Gauge network of Indian Railways by March 31, 2021.
• CORE plans to electrify all BG routes of the Indian Railway by December 2023.