Six persons- H, I, J, K, L and M have different heights.
Only two persons are shorter than M.
M > ___ > ___
J is taller than M and shorter than L.
L > J > M > ___ > ___
H is taller than K.
K is shorter than J.
K is not the shortest person.
L > J > M > K > ___
As many persons are shorter than I as taller than H.
H is taller than K.
H > L > J > M > K > I
The height of second tallest person is 169cm.
Difference between the height of L and K is 34cm.
H > L(169cm) > J > M > K(135cm) > I
This is the final arrangement
L + M = 309cm
L = 169cm
M = 309 - 169 = 140cm
K + J = 293cm
K = 135cm
J = 293 - 135 = 158cm
Thus, M + J = 140 + 158 = 298cm