Question

the walls and ceiling of a room are to be plastered the Length, breadth and height of the room are 4.5m,3 m and 350 CM, respectively. find the cost of plastering the room at the rate of rupees 12 per metre square

Answer 1

let the length of the room be l=4.5 m.

let the breadth of the room be b=3 m.

let the height of the room be h=350 cm=3.5m

area of the four walls =2lh+2bh=

area of the ceiling = lb=4.5×3=13.5 metre square

Answer 2

Answer:

Answer is Rs 528

Step-by-step explanation:

length = 4.5 m

breadth= 3 m

height= 350 cm = 350/100 = 3.5 m

Area of walls = 2( l+ b) h

= 2( 4.5 + 3 ) 3.5

= 52.5 m ^2

Area of ceiling = l × b

= 4.5 × 3 = 13.5 m^2

Area of room = 52.5 + 13.5

= 66m^2

Cost of plastering = 66 × 12

= Rs 792