A sum of rs 62400 is paid off in 30 instalment, such that each instalment is rs 100 more than its preceding instalment. Calculate the value of the first installment.
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Answer:
x +x+100+x+200+x+ 300.......x+2900
= 62400
30x +2900 = 62400
30x=62400-2900 = 59500
x = 59500/30= Rs 1983.33. Ans
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