A histogram bar representing 20<t≤35 20<t\leq35\,20<t≤35 has width 4.5 cm, height 3.6 cm and frequency 72. A second class is 35<t≤45 35<t\leq45\,35<t≤45 and has frequency 80.
Find the width and height, in centimetres, of the second bar on the same diagram.