Question

the Length breadth and height of a room are 5 metre and 4 and 3 presently find the cost of whitewashing the Wall of the room and the selling at the rate of 7.5 per metre square solustion
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Answer 1

Answer:

$405

Step-by-step explanation:

Find the surface area of the walls

Surface area of the 4 walls = Perimeter x height

Surface area of the 4 walls = (5 + 4 + 5 + 4) x 3

Surface area of the 4 walls = 18 x 3

Surface area of the 4 walls = 54 m²

Find the cost:

1 m² = $7.50

54 m² = 7.5 x 54

54 m² = $405

Answer: The cost is $405

Answer 2

white washing will be done only on the wall so we will first find the lateral surface area...

lateral surface area of a cuboid = 2h(l + b)

2* 3(5 + 4 )

6 × 9

54 m^2

rate = 7.5

54* 7.5

405 Rs..

hope it helps you.....