We have
AP = 34,36,38......,234
a, (first term) = 34
n ( total terms ) =?
d ( common difference ) = 2
so, a +(n-1)d =an
34+(n-1)*2 = 234
(n-1)2 = 234-34
n-1 = 200/2
n = 100+1
n =101
Now sum of the even no.
Sn = n/2( 2a+9n-1)d)
= 101/2 (2*34 +100*2)
= 101/2 * 268
=101 *134
= 13534
