Let h,l, and w represent the height, length, and width of the building respectively
Then



The new value of h = 50m, but l remains the same.
That is l = 10m
Therefore

Hence, the width is 2.5m
(2,5) ...........................................................................................
Port is to carry
Voc is to voice or call
Tract is to pull
Vac is to empty
Struct is to build or form
Sorry I'm gonna take a guess.......... d?