If a solid piece of an aluminium cylindrical rod has a volume of 200 cm3 and a base area of 20 cm2, what is the length of the piece of aluminium rod?

A) 10 cm
B) 100 cm
C) 400 cm
D) 4,000 cm

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?