I wouldn't think under 20000inr would be good as a work station. That's only $340US.
Closest I could come to would be -
CPU: AMD A8-6600K 3.9GHz Quad-Core Processor ($89.99 @ SuperBiiz)
Motherboard: Asus A88X-PRO ATX FM2+ Motherboard ($86.99 @ Newegg)
Memory: G.Skill Ripjaws X Series 4GB (2 x 2GB) DDR3-1600 Memory ($35.99 @ Newegg)
Storage: Seagate Barracuda 250GB 3.5" 7200RPM Internal Hard Drive ($38.99 @ Amazon)
Case: NZXT Source 210 (White) ATX Mid Tower Case ($38.99 @ SuperBiiz)
Power Supply: SeaSonic 300W 80+ Bronze Certified ATX Power Supply ($39.98 @ Newegg)
Total: $330.93