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 Rs 7.50 per m
.​

Answer 1

Answer:

• The cost of white washing the walls of the room and the ceiling at the rate of Rs 7.50 per m is Rs 555

step-by-step explanation:

★ Given :

• The length, breadth and height of a room are 5 m, 4 m and 3 m respectively.

★ To find :

• The cost of white washing the walls of the room and the ceiling at the rate of Rs 7.50 per m²

★ Solution :

: $\implies$ 2 × ( lb + bh+ hl ) l × b

: $\implies$ 2 × ( 5 + 4 ) × 3 + 5 × 4

: $\implies$ 54 + 20

: $\implies$ 74 m ³

The cost of white washing = Total Area to be white washed × Rate per unit area

: $\implies$ 74 × 7.5

: $\implies$ 555

Hence, the total cost of white washing is Rs. 555.

★ Additional information :

• We have not considered the total surface area of the room because the floor is not white washed. So, curved surface area and area of ceiling is considered, as we have been asked in the question.

• Find out the area of 4 walls and the ceiling individually. Add them together to get the total area. Then find out the costing for white wash.

• L used for length

• B used for breath

• H used for Hight

Answer 2

Answer:

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 Rs 7.50 per m

.

74m3

Step-by-step explanation:

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 Rs 7.50 per m

. 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 Rs 7.50 per m

. 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 Rs 7.50 per m

. 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 Rs 7.50 per m

. 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 Rs 7.50 per m

. 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 Rs 7.50 per m

. 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 Rs 7.50 per m

. 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 Rs 7.50 per m

. 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 Rs 7.50 per m

.