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

Mujeed

3 years ago

i dont think i understand this explanation

Aulphur

1 year ago

Step 1: Find the External Surface Area

An open rectangular box means it has no top. The external surface area consists of:

Bottom: 12cm²

Two sides: each → 32cm²

Front and Back: each → 24cm²


Step 2: Add Up the Areas

12 + 32 + 24 = 68m²

Step 3: Find the Cost of Painting

Cost per square meter = N2.00
Total cost =

So, the total cost of painting the box externally is N136.00.

note: the answer above is wrong

Dynamy

2 years ago

the answer is 136 since it is only having one face open. A cubiod has 6 faces. one face is opened making 5 faces.
3(4×3) +2(4×4)= 68
then 68× #2= #136

Zohhe

5 years ago

the box is only opened at one end

dera0000

3 years ago

this explanation is not clear