Question

The length, breadth and height of a room are 8m, 6m and 5m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate off 7.50 per m2.

Answer 1

Answer:

Rs 555

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

Given:-

• length = 8m
• breadth = 6m
• height = 5m

To find:-

• the cost of white washing the walls of the room and the ceiling at the rate off 7.50 per m².

step-by-step solution:-

Length, breadth and height of a room are 8m, 6 m and 5m.

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

• => 2×5(8 + 6)
• => 10 × 14
• => 140m²

• Area of the ceiling = l×b

• => 8 × 6
• => 48m²

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

• => 140 + 48
• => 188m²

Cost of white washing = Rs 7.50m²

• Total cost of white washing

• => 188 × 7.50
• => Rs.1410