The dimensions of a box are 2, 3 and 4 meters. The cost of painting the outer sides of the box at the rate of taka 3 per square meter is-

The dimensions of a box are 2, 3 and 4 meters. The cost of painting the outer sides of the box at the rate of taka 3 per square meter is- Correct Answer TK. 156

Total outer area of the box = 2 ( ab + bc + ca ) = 2 ( 2 x 3 + 3 x 4 + 4 x 2 ) = 52 Therefore, total cost = 52 x 3 = 156 TK.
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