A small indoor greenhouse (herbarium) is made entirely of glass panes (including base ) held together with tape . it is 30cm long ,25 cm wide and 25 cm high . 1. what is the area of the glass? 2. How much tape is needed for all the 12 edges ?

Answers (1)

Solution:  1. We have , 

               Length =30 cm , breadth = 25cm  and height = 25cm

	herefore            Area of the glass = Total surface area of the cuboid of the length 30cm, breadth 25cm, and height  25cm.

                                         =2(30	imes25+25	imes25+30	imes25)cm^2                     [ecause surface area =2(lb+bh+lh)]

                                         =2(750+625+750)cm^2=4250cm^2

 

2.   Length of tape = Length of the all 12 edges 

                              = 4(Length + Breadth + Height )= 4(30+25+25)cm=320cm

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