The dimensions of a metallic box are 20 cm, 15 cm and 10 cm. If the cost of the sheet is rs. 20 per 1002 cm, then the cost of making a closed box is Rs.
(A) 280
(B) 250
(C) 240
(D) 260
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(A) 280
(B) 250
(C) 240
(D) 260
option D)
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