1.

Find the sum of first 40 positive integers divisible by 6.

Answer» 4920
AP=6,12,................,240n=40,d=6,l=240Sn=n/2(a+l)Sn=40/2(6+240)Sn=20(246)Sn=4920. Ans..........
andFindtheratiooftheareaof
4920......


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