the difference between the 11th term of an AP is 49 and if the 11th term is 74/25 times the 4th term determine ,the common difference ,the first term of the sequence and the 61st term of the sequence
c'mon - just use your formulas:
But first, fix it so it makes sense.
"the difference between the 11th term of an AP is 49"
is just gibberish.
But, the next sentence says
a+10d = 74/25 (a+3d)
use that to find a and d, and then go fo
a60 = a+59d