Fast plus economical.
For Karnataka express in 3A (whose seats vanish within a few days of ARP opening) you pay Rs. 1820 for Bangalore-Delhi in 39h 10mins. Here you pay 1180 plus 575 = 1755 in 35h 40m. Need I write more?
PS: For a less risky connection check http://indiarailinfo.com/chain/15790/136/748
15791/Σ CHEAPEST 3A chain for Bangalore-Delhi v2.0 ΣChain
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