I just went to the Rival site to look at the rice cookers and read the instruction manual
for their 6-cup cooker. It doesn't really give a time, in minutes, for cooking rice, but it instructs you to observe it until all the water is evaporated. I suppose the best recommendation I could offer is to cook a recipe of rice and time it. This would give you some general idea of the time you should allow in order for your rice to be ready when you need it.