Ms Aini went on a cycling expedition around Singapore.<br>She travelled a total of 180 $$km$$.<br>She started cycling at 04 30 and reached the ﬁnishing point at 09 00.<hr>What was her average speed? <br> <input min="0" type="number" id ="imp6pg163q4_1" class="lineinput" placeholder="?" /> $$km/h$$