Question

A cubical box with lid has a length of 30cm find the cost of painting the inside and outside of the box at rupees 5.50 per metre square​

Answer 1

Answer:

We have to find the surface area of the cubical box.

Surface area of the cube = 6a? ?where a = 30 cm

=>6x 30x 30

=>5400 sq cm

As the cubical box has to be painted both from the outside and inside.

So, the total surface area = Inner surface area + outer surface area

=> 5400 + 5400?

=> 10800 sq cm

As we know that 1 sq m = 10000 sq cm

Surface area in sq m = 10800/10000

Surface area in sq m = 1.08 sq m.

Cost of painting the cubical box = Rs. 5.50 per sq m

Total cost of painting = 5.5*1.08

Total cost = Rs. 5.94

So, the total cost of painting the cubical box from outside and inside is Rs. 5.94(Answer)

Regards DEVIL OP

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