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Trade and other receivables (Tables)
 12 Months Ended
Mar. 31, 2023
Schedule of trade and other receivables

   March 31, 
   2022   2023 
Trade receivables (net of allowance)   1,897,590    2,817,604 
Receivables from joint venture (net of allowance) (refer to note 41)   -    530 
Refund and other receivable (net of allowance)   37,112    52,478 
Total   1,934,702    2,870,612 
Contract Assets (refer to note 8)   11    190,598 
    11    190,598 
Total   1,934,713    3,061,210