Respuesta :

Answer:

See below.

Step-by-step explanation:

Given :-

  1. Length = 10 m
  2. Breadth = 5 m
  3. Height = 12 m
  4. Cost of white washing = ₹7 per m²

To Find :-

  • cost of washing 4 walls
  • cost if ceiling is also washed

Solving :-

Step 1 : Find the area of 4 walls

  • Area = 2 x 12(10 + 5)
  • Area = 24 x 15
  • Area = 360 m²

Step 2: Cost for 4 walls

  • Cost = 360 x 7
  • Cost = ₹2520

Step 3: Find Area of Ceiling

  • Area = 10 x 5 = 50 m²
  • Total area = 360 + 50 = 410 m²

Step 4: Total Cost

  • Cost = 410 x 7
  • Cost = ₹2870

Given↷

Length of the room⇢ 10m

Height of the room⇢12m

width of the room⇢5m

Cost of white washing a m²⇢₹7

To find↷

the total cost of white washing of 4 walls + the ceiling of the room

Answer↷

₹2,870

Solution↷

To find the total cost of white washing of 4 walls + the ceiling of the room ,

we'll find the lateral surface area of the room & the area of the ceilings then add them up and multiply the answer by 7

  • Lateral surface area ⇢2h(l + w)
  • Area ⇢l x w

Lateral surface area of the room

⤿ 2 x 12m(10m+5m)

⤿2 x 180m²

⤿360m²

Area of the ceilings

⤿ 10m x 5m

⤿50m²

Cost of white washing 4 walls + the ceiling

⤿ ₹7(360m²+50m²)

⤿₹7 x 410m²

⤿₹ 2,870

Otras preguntas