-formal or informal Realialable assesment is when you get a same mark no matter what ?
-amount of material is mass
-volume is the space we occupy
-capacity is used to describe space available
in this lesson we need to find out the height of the stairs from the higest level to the lowest level .
therefore i calculated all the stairs (16+16+16+14)=62 steps
each step is 15 cm
therefore 15 times 62 is 930 cm .which is also 9 meters 30 cm