First term = 2Let d be the common difference of the A.P.Therefore, the A.P. is 2,2+d,2+2d,2+3d,… Sum of first five terms =10+10 dSum of next five terms =10+35 dAccording to the given condition,​10+10d=41​(10+35d)⇒40+40d=10+35d⇒30=−5d⇒d=−6∴a20​=a+(20−1)d=2+(19)(−6)=2−114=−112​  Thus, the 20th  term of the A.P. is −112.