a door of length 2 metre and breadth 1 metre and a window of length one metre and breadth 0.5 are fitted in a wall 4.5 metre in length and 4m in a breadth .find the cost of washing the wall at the rate of rupees 20 per m².
Answers
Step-by-step explanation:
the length of door =2 mtr
breadth of door =1 mtr
let find the area
area of rectangle = length * breadth
= 2*1
=2
the length of window = 1 mtr
the breadth of window=0.5 mtr
let find the area
area of rectangle =length*breadth
= 1*0.5
=0.5
the length of wall= 4.5 mtr
the breadth of wall = 4 mtr
let find the area
area of rectangle= length*breadth
= 4.5*4
= 18
now, we have to do the sum of the area of window and door and subtract it by the area of wall
adding
=2+0.5
=2.5
subtracting
2.5 from 18
18-2.5
=15.5
now, finally we have find the area of wall by living door and window
for doing white wash we have to multiply our area of wall from rs =20
15.5*20
=310.0
the cost of the doing whitewash of the wall is 310 rupees per metre