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the two parts.5: A box without lid is made by wood of thickness 3cm. Its outer dimensions are 146 cm x 116 cm x83 cm. Find the cost of painting the internalsurface of box at the rate R 2 per 1000 sq.cm. |
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Answer» Length of inner side =146-3=143breadth of inner side=116-3=113height of inner side=83-3=80 tsa of a cuboid=2(lb+bh+lh)-lb =2(143x113+113x80+80x143)-143x113 =2(16159+9040+11440)-16159 =2(36639)-16159 =57119cm^2cost of painting 1000cm^2 = Rs 2then the cost of painting 57119 cm^2 = (57119×2)/1000= 114238/1000=114.238 rs please like my answer if you find it useful |
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