A contract on construction job specifies...

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 Rs50 more than for the preceding day. How much money the contractor has to pay as penalty , if the has delayed the work by 30 days?

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27750

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Menstrual cycle takes how many days?

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KUMAR PRAKASHAN-ARITHMETIC PROGRESSION-EXERCISE 5.3