Question

A small indoor greenhouse (herbarium) is made entirely of glass panes (including base) held together with tape. Greenhouse is 40cm long, 30cm wide and 30cm high. Find area of the glass sheet required
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Answer 1

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Given:

Greenhouse is 40 cm long, 30 cm wide and 30 cm high

To find:

Area of the glass sheets required = ?

Solution:

As, The greenhouse is cuboid shaped here.

Length = l = 40 cm

Breadth or width = b = 30 cm

Height = h = 30 cm

Therefore, Area of glass sheets = Surface area of the glass sheets

Area of glass sheets = 2[lb + bh + lh]

Area = 2[ 40 × 30 + 30 × 30 + 40 × 30]

Area = 2[ 1200 + 900 + 1200 ]

Area = 2[ 3300 ]

Area = 6600 cm²

Answer:

Therefore, Area of glass sheets required is 6600 cm²

Additional points:

• Here,

$\\ \\ surface \: area \: of \: cuboid \: = \\ \\ 2(lb \: + bh \: + lh) \\ \\ l \: = length \\ \\ b \: = breadth \: or \: width \\ \\ h = height$

• While calculating area of sheets required we use surface area formula because we have to find the area of the sheets required to cover the entire area of cuboid
• Solve more such questions to get good hold on it