The internal length, breadth and height of an open box are 85 cm, 65 cm and 72.5

Question

The internal length, breadth and height of an open box are 85 cm, 65 cm and 72.5 cm respectively. The cost of painting the outside of the box leaving its bottom at 60 paise per square decimetre, if the thickness of the box is 25 mm, is

Options:

A . Rs 142

B . Rs 144

C . Rs 146

D . none of these

Answer: Option B

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