Question

the length,breadth,height of a hall are 10m,8m,6m,respectively.the hall has two doors of area 2m multiple 1.5m and three Windows of area 1.5m multiple 1m . find the cost of painting the walls(only the walls)at the rate of RS.180 per square meter

Answer 1

Hope it helps........

Answer 2

Answer:

The cost of the wall is Rs.36990      

Step-by-step explanation:

Given : The length, breadth, height of a hall are 10 m,8 m,6 m,respectively. The hall has two doors of area 2 m × 1.5 m and three Windows of area 1.5 m × 1 m .

To find : The cost of painting the walls(only the walls)at the rate of Rs.180 per m²?

Solution :

The length, breadth, height of a hall are 10 m,8 m,6 m,respectively.

The area of the hall is $A=2(l+b)h$

$A_h=2(10+8)6$

$A_h=2(18)6$

$A_h=216m^2$

The hall has two doors of area 2 m × 1.5 m.

The area of the two door is $A=2\times l\times b$

$A_d=2\times 2\times 1.5$

$A_d=6m^2$

The three windows of area 1.5 m × 1 m .

The area of the three window is $A=3\times l\times b$

$A_w=3\times 1.5\times 1$

$A_w=4.5m^2$

Area of walls excluding door and window is

$A_W=A_h-A_d-A_w$

$A_W=216-6-4.5$

$A_W=205.5m^2$

The cost of the wall is Rs.180 per square meter.

The cost of the wall with area 205.5 square meter is

$C=205.5\times 180$

$C=Rs.36990$

Therefore, The cost of the wall is Rs.36990.