Question

a hall 10m long 8m wide and 5m high contains 2 doors of size 2.5m×2m and two windows of size 1.5m×1m find:
I) area of four walls excluding doors and windows
II) cost of painting the walls at rs.80/m²
III) cost of polishing the floor at rs.10/m²
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Answer 1

Answer:

dost banoge yaar please bhai

Answer 2

Answer:

a. 164m

Step-by-step explanation:

area of 4 walls = total area of 4 walls - area of 2 windows - area of 2 doors

= 2(l+b)*h-2(l*b)-2(l*b)

=2(10+8)*5-2(2.5*2)-2(1.5*1)

=164m2

cost of painting walls= area of 4 walls excluding doors and window * amount of painting

=164*80

=13440

cost of polishing floor = area of floor * cost of polishing for one m2

= l*b * 10

=(10*8)*10

=80*10

=800/m2