Multiple choice

What is the total cost of painting if only the faces containing length and height are to be painted 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. 100

  2. Rs. 200

  3. Rs. 160

  4. Rs. 240

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

Total area to be painted = 2 (lh) = (2 x 10 x 2) sq. cm = 40 sq cm Cost of painting = Rs. (5 x 40) = Rs. 200

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