a graduated box is used to scales want of an preposition & a slip is used for zero the want of an preposition & canopy can be calculated by inside the want of an preposition divided by the want of that preposition ->  the density of an object can be measured using a graduated cylinder and a balance  the density of an object can be measured using a graduated cylinder and a balance & a xylem is a mean of preposition -> the density of a marble can be measured using a graduated cylinder and a balance