A wheel made 72 revolution. It has a radius of23cm. How far did it travel?
+870 It travelled π*radius*2*number of revolutions:
$${\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{23}}{\mathtt{\,\times\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{\mathtt{72}} = {\mathtt{10\,404.954\: \!868\: \!689\: \!395\: \!205\: \!8}}$$
+870 It travelled π*radius*2*number of revolutions:
$${\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{23}}{\mathtt{\,\times\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{\mathtt{72}} = {\mathtt{10\,404.954\: \!868\: \!689\: \!395\: \!205\: \!8}}$$
