Question

a hall is 17.5 M long 12.5 M wide and 15 M high inside it there are two doors each of dimensions mm into 3.5 M and 3 windows each of dimension for m into 3.5 M find the cost of whitewashing the walls at 60 paise per square metre

Answer 1

Answer:

Step-by-step explanation:

For The hall ,

Length=17.5m, Breadth=12.5m, height=15m.

Area Of Four walls of a room= 2*h*(l+b)

                                                =2*15*(17.5+12.5)m square.

                                                 =900m square.

For the doors,

Area=2*(3.5)m=7m square

For windows,

Area=3*(3.5)m=10.5m square.

Area not To Be Whitewashed=7+10.5m=17.5m square.

area to be whitewashed=(900-17.5)=882.5m square.

so the cody will be=rupees 60*882.5= $5295 is the answer.