Question

The measures of a cuboidal room are 12 m x 8 mx 4 m. Find the total cost of
whitewashing all four walls of a room, if the cost of whitewashing is €5 per m2
​

Answer 1

• Length of room = 12m
• Width of room =8m

Area of four walls of room = Perimetre of base× Height of room

=2(l+b)h

=2(12+8)X4=160m^2

Cost of whitewashing per m^2=€5

Area of ceiling =12X8=96m^2

Cost of whitewashing ceiling =(96X5)=€480

Total Cost of whitewashing=

(800+480)=€ 1280