density with grids

John Mason commented that the topic of compound measures might be better started with 'density' than speed - because it can be more visual

a powerpoint is here

part : whole ratios, maybe conveniently expressed as a fraction
some involving cancelling
some involving the lcm (or both)

see also population density of grids
and ratio in car parks

optimisation problem

the question is very similar to one set by SQA (Scotland) in may, 2015
students could tackle the question using calculus but that is not the intention here

it is to build up a formula and substitute values into the formula to find a minimum

a ppt is here

population density of grids

the powerpoint is here

see also density with grids

speeding

compound measures

some compound measures tasks
the powerpoint is here

ratio in car parks

a consideration of the compound measure of density, in a context of ascertaining which car park seems (and is) fuller

relating the number of cars to the number of spaces

a powerpoint is here