Multiple choice

What is the cost of painting the cuboid with Red colour?

The length, breadth and height of a cuboid are 10 cm, 8 cm and 2 cm, respectively. All the faces of the cuboid are to be painted. The cost of painting with red colour is Rs. 5 per sq. cm. with green colour is Rs. 6 per sq. cm and with yellow is Rs. 10 per sq. cm. Now, answer the questions.

  1. Rs. 1392

  2. Rs. 1160

  3. Rs. 2320

  4. Rs. 580

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total surface area of the cuboid = 2 (lb + bh + hl) = 2 (10 x 8 + 8 x 2 + 2 x 10) sq. cm = 2 (80 + 16 + 20) sq. cm = 2 (116) = 232 sq. cm Cost of painting = Rs. (5 x 232) = Rs. 1160

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