Rita is going to make some cheeseburgers for a party.
she buys some packets of cheese slices and some boxes of burgers.
there are 20 cheese slices in each packet.
there are 12 burgers in each box.
rita buys exactly the same number of cheese slices and burgers.
i) how many packets of cheese slices and how many boxes of burgers does she buy?
rita wants to put one cheese slice and one burger into each bread roll.
she wants to use all the cheese slices and burgers.
ii) how many bread rolls does rita need?