Answer:
The total cost of redecoration is £66, that is less than £75. Tenant can decorate the room for the budget set.
Explanation:
Lets start calculating the areas of shorter and longer walls.
The area of shorter wall is
2.65m*2.98m=7.897m^2.
The area of longer wall is
3.94m*2,65m=10.441m^2.
Together the area of one long and one short wall is
7.897m^2+10.441m^2=18.338m^2.
The area to be painted ( one short and one long wall) is 18.338m^2 that is less than 30m^2, and hence only one tin of paint is needed (costs £16).
If there is assumed that the sheets of wallpaper must be whole from floor to ceiling, the calculations are following.
We get from one roll
10m/2.65m=3.77 sheets; we can use only 3 of them
The width of the walls is 3,94m+2,98m=6,92m,
and division gives 6.92m/0.52m=13,3... .
Hence it requires 14 sheets, that is 5 rolls of wallpaper.
Wallpaper costs 5*£10=£50 and altogether it is needed £50+£16=£66 to redecorate the room.