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Question

A small indoor greenhouse (herbarium) is made entirely of glass panes (including base) held together with tape. It is 30cm long, 25cm wide, and 25cm high.
(i) What is the area of the glass?


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Solution

Step 1: Given data:

The dimension of the greenhouse is 30cm×25cm×25.

The total edges of the greenhouse are 12,

We know that the surface area of a cuboid is A=2a×b+b×c+c×a, where a,b and c are the lengths, width, and height of the cuboid.

Step 2: Finding the area of the glasses:

It is clear that the greenhouse is a cuboid. As we know that the surface area of a cuboid is A=2a×b+b×c+c×a

So,

A=2a×b+b×c+c×a=230×25+25×25+25×30=2750+625+750A=4250cm2

Hence, the area of the glass is 4250cm2.


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