Question

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

m2

. @tushar468​

Answer 1

Step-by-step explanation:

Length, breadth and height of a room are 5 m, 4 m and 3 m.

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

=2×3(5+4) 

=6(9)

=54 sq m

Area of the ceiling =l×b

=5×4

=20 sq cm.

Total area of the four walls and the ceiling of the room

=54+20

=74 sq cm

Cost of white washing = Rs 7.50 per sq m

Total cost of white washing =74×7.50= Rs 555

Answer 2

Answer:

2(l+b)h

2×5+4×3

2×9×3

54m²

54x7.5

405 ripper/m2