Question

a box has a length 36cm breadth 30cm height 40 cm. find the cost of painting ot from outside at the rateRs 5 per cm2​

Answer 1

Answer:

the cost of painting the box is 37200 rs.

Step-by-step explanation:

so as per the given question, we need to find out that what will be the cost of painting a box that has length of 36 cm , breadth of 30 cm, and height of 40 cm

and the cost of painting is rs 5per cm sq.

so in order to find the cost of painting , we need to find out the area to be painted.

so we Know that in a cuboid

there are two faces for each containing L and B, B and H and two with L and H.

and when we find the total surface area, we have to add all the possible faces.

S , let is denote the complete surface area,

S= LB+BH+LH+LB+BH+LH

S=2(LB+BH+LH)

where L denotes the length, B denotes the Breadth and H denotes the height

as per the question,

L=36 cm

B= 30 cm

H=40 cm

now putting the values,

S=2(36 x 30 + 36 x 40 + 30 x 40)

 = 2(1080+ 1440 +1200)

 = 2( 3720)

 =7440 cm sq.

now we need to find the cost

cost per cm² is 5 rs.

so cost for 7440 cm² will be (7440 x 5 )= 37200 rs.

the cost of painting the box is 37200 rs.

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Answer 2

Total cost of painting it from outside  = ₹216000

Step-by-step explanation:

According to the given information,

length of box = 36cm

breadth of box = 30cm

height of box = 40cm

so, the volume of the box = length × breadth × height

                                          =36 × 30 × 40

                                           = 43200 $cm^{3}$

The cost of painting it from outside at the rateRs 5 per $cm^{3}$

So, Total cost = 43200×5 = ₹216000

Hence the answer is ₹216000.

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