If 10 times of 10th term is equal to 20 times of 20th term of an A. P. – InterviewSolution

1.	If 10 times of 10th term is equal to 20 times of 20th term of an A. P. find its 30tterm.
Answer» Let x be first term and a be the common difference10th term = x+9a20th term=x+19a30th term=x+29agiven1010th term=2020th term10(x+9a)=20(x+19a)10x+90a=20x+380a20x-10x+380a-90a=010x+290a=010(x+29a)=0x+29a=030th term=0.

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