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1. 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 tk. 3 per square meter is ___
- A. tk. 156
- B. tk. 156
- C. tk. 156
- D. tk. 156
Answer: Option A
Explanation:
Area = 2(ab + bc + ca) = 2((2*3) + (3*4) + (4*2)) = 2(6 + 12 + 8) = 52 Total cost = 52*3 = 156 tk.
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