which term of the AP 3,8,13 etc is 248?

seee in thiss

an is 248 or l is 248

a = 3 and d = a2 - a1 = 8- 3=5

an = a + (n-1)d

248 = 3 +(n- 1) 5

245= (n- 1)5

n-1 = 49

n= 49+1

n= 50

hope u thumb up