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
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Total surface area(s) = 2(4 x 3) + 2(4 x 4)
= 2(12) + 2(16)
= 24 + 32
= 56cm2
1m2 costs N2.00
∴ 56m∴ will cost 56 x N2.00
= N112.00
Source: Myschool Past Questions Archive (Record #32172)