A sight-testing chart, measuring 120cm by 80cm with its longer dimension vertical, is to be viewed by reflection in a plane mirror. The observer's eye and the chart are each 3m from the mirror. a) Find the minimum size of the mirror that can be used to see the whole chart. b) If the observer's eye is 1.3m above the floor, and the lower edge of the mirror is 1.5m above the floor, how high is the lower edge of the chart?
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syktg the same time I have a look at the moment, but I think I have a look at the moment,
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