Question

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

Answer 1

Total surface area of box except lid

$= 5 {side}^{2} \\ = 5 \times {0.3}^{2} \\ = 5\times 0.09 \\ = 0.45 {m}^{2} \\ cost \: of \: painting = 5.5 \times 0.45 \times 2 \\ = 4.95rupees$

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Answer 2

Answer:

We will find the total surface area and then multiply it by 5.5 to get the answer.

Answer by-Sankalp