Question

2. The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the
cost of white washing the walls of the room and the ceiling at the rate of ₹7.50 per m²
​

Answer 1

Answer:

the answer is described below.

Step-by-step explanation:

lenghth= 5m

breadth = 4m

height = 3m

therefore, the sum of area of the 4 walls=

2 × { ( 5 × 3) + (4 × 3) }

= 2 × { 15 + 12 }

= 2 × 27

= 54 square m

and, the area of the ceiling = 5 × 4 sq m

= 20 square m

therefore,the total area of ceiling and walls = 20 + 54

= 74 sq m

since the cost of white washing is 7.50 per sq m

therefore, the cost of whitewashing the ceiling and walls = 7.50 × 74 Rs

= 555 Rs.

hope it helped.... please like and follow me