strength of materials - MK

[ quiz avrg / middle-test ] :

58/70  65/80  75/70  67/80  68/80  68/80  66/80  77/70  73/80  70/80  62/70  68/80  83/80  73/80  75/80  68/70  63/80  60/80  70/80  63/70  73/80  68/80  73/80  85/80  67/70  78/80  73/80  70/80  68/80  80/80