An open rectangular box externally measures 4m x 3m x 4m. Find the total cost of painting the box externally if it costs N2.00 to paint one square meter

A.
N96.00 
B.
N112.00 
C.
N136.00 
D.
N160.00
Correct Answer: Option B
Explanation
Total surface area(s) = 2(4 x 3) + 2(4 x 4)
= 2(12) + 2(16)
= 24 + 3^{2}
= 56cm^{2}
1m^{2} costs N2.00
∴ 56m∴ will cost 56 x N2.00
= N112.00