area of four walls
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Answer:
2( l + b )h.
Step-by-step explanation:
Consider a 3-D situation, where length of that rectangle be l, breadth be b and height be h.
We know,
Area of a rectangle is defined by length x breadth.
In that 3-D situation :
Two walls have same length l of base and height h. So, areas of those walls is l x h + l x h = lh + lh = 2lh
Similarly, two walls have same length( here breadth ) b of base and height h. So, areas of those walls is b x h + b x h = bh + bh = 2bh
Total area = 2lh + 2bh
= 2( l + b )h
Hence the area of four walls is 2( l + b )h, which is also known as product of area of base and height.
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