Fernanda Rodrigues topped the scorers of Brazil with 11 points, while Natalia Pereira added 9 in the victory. Fabiana Claudino, who only played two sets, had seven.
Letitia Moma was the only player for Cameroon who reached double figures in the scores with 12 points.
Brazil led in attacks 45-29, blocks 9-3 and also in aces 3-2. The winners made 14 unforced errors to 18 by the defeated side.
Brazil roared past Cameroon in the one-sided first set with an assortment of strong spikes combined with the nervousness of the African side. Fernanda Rodrigues and Sheila Castro led the way for the home side in the 25-14 first set.
In the third set, Brazil jumped into an 8-4 lead and never looked back as the coach Ze Roberto Guimaraes rotated his players giving playing chances to some reserves.