Question 44
Mensuration of SolidsAn open rectangular box externally measures 4m × 3m × 4m. Find the total cost of painting the box externally if it costs ₦2.00 to paint one square metre.
- A.₦96.00
- B.₦112.00
- C.₦136.00
- D.₦160.00.
Show the answer and explanation
Answer: C (₦136.00)
Explanation
Painted area = base 4 × 3 = 12m² plus sides 2(4 × 4) + 2(3 × 4) = 56m², total 68m². At ₦2.00 per m² the cost is ₦136.00.