Question

The length of a rectangular room is 3 times its height and the breadth is 2 times the height. The cost of white washing the four walls of the room at the rate of 10 per sq. m is 14,400. Find the cost of tiling the floor at the rate of 120 per sq. m.​

Answer 1

Answer:

cost of tiling floor = 103680 rs

Step-by-step explanation:

given,

L= 3*h B= 2*h

Rate of washing walls = 10 per m²

total cost of washing= 14400 rs

Area of walls = total cost / Rate of washing walls

Area of walls = 14400/10

Area of walls = 1440 m²

here

2*(L*h)+2*(B*h)=1440

2*(3h*h)+2*(2h*h)=1440

6h²+4h²=1440

10h²= 1440

h²= 144

h= 12 m

Area of floor

= L*B

=3h*2h

=(3*12)*(2*12)

= 864 m²

Area of floor= 864 m²

cost of tiling floor = Area of floor* Rate of tiling

= 864*120

= 103680 rs

cost of tiling floor = 103680 rs