Hey

I got a couple of questions that I tried really hard to do but I still think it's wrong.

Here are the questions,

1. "If a single roll of wallpaper will cover 3 square meters, how many single rolls will it take to cover a wall 2 meters x 5 meters?"

2. "If a customer buys 2kg. of nails at 16cents a kg., how much would the nails cost?"

3. "If ceramic tiles are 203mm x 203mm, how many tiles would it take to cover an area 1 meters x 2 meters?"

Thanks.