Q4) Solve the following questions.

i. A carpenter is making 220 chairs each month, plans to increase its production. The number of chairs produced is to be increased by 20 each month from 220 in fist month to 240 in second month, to 260 in third month and so on, until it is producing 1200 in N month. After how many months its production will touch the figure of 1200

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