Question

The four walls of a room-6 m long, 3 m broad and 3.5 m high are to be painted. If the rate of painting is 3 650 per m², find the total cost of painting.​

Answer 1

Answer:

length = 6 m

breadth = 3 m

height = 3.5 m

the area of the four walls = 2( l + b )h

                                          = 2 x ( 6 x 3 ) x 3.5

                                          = 18 x 7 = 126 m square

the area of costing 1 metre of painting = 3650 rs

the cost of painting 126 metre square of wall = 3650 x 126

                                                                           = 459900 rs

Step-by-step explanation:

Answer 2

Answer:

229950 rupees

Step-by-step explanation:

According to the information provided in the question it is given as

Length=  l = 6 m

Breadth= b = 3 m

Height = h =3.5 m

Rate of painting  is = 3650/$m^{2}$

We need to find the total cost of painting

Area of four walls of room =

$=2(l\times h + b\times h)\\=2(6\times 3.5 +3\times 3.5)\\=2(21+10.5)\\=2(31.5)\\=63m^{2}$

Hence total cost of painting = Area of four walls x rate per $m^{2}$

                                               = 63 x 365

                                               = 229950 rupees