William has been contracted to paint a school classroom. The classroom is 20 m long, 15 m

wide and 5 m high. There are four windows (2m by 3m) and a door (2m by 1m).
a) What is the cost of painting the ceiling at N$ 6.50 /m²?
b) What is the cost of painting the walls (excluding the windows and door) at N$ 8.50
/m²?
c) What is the cost of tiling the floor using tiles (20 cm by 20 cm) that are sold in boxes
of 50 tiles each at N$ 50 per box?
d) What is the cost of providing air conditioning for this classroom at N$ 60 / m³?

4 answers

20 m

Student

235

William is 450