31. Exercise problem XXVI

A contract on construction job specifies a penalty for delay of completion beyond a certain date as follows: \(Rs. 200\) for the first day, \(Rs. 250 \)for the second day, \(Rs. 300\) for the third day, etc., the penalty for each succeeding day being \(Rs. 50\) more than for the preceding day. How much money the contractor has to pay as penalty, if he has delayed the work by \(30\) days.

 

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