Sequences and Series

Let $V(r)$ denote the sum of the first $r+1$ terms of an arithmetic progression whose first term is $r+1$ and common difference is $\dfrac 1r$ . Let T(r) = V(r)- V(r-4) & S= V(1) + V(2) ........+ V(10)

Then V(11) x common difference of the series T(11),T(12),T(13) is