# Glass door

What is the weight of glass door panel 5 mm thick height 2.1 meters and a width of 65 cm and 1 cubic dm of glass weighs 2.5 kg?

Result

m =  17.063 kg

#### Solution:

$h = 5/100 = \dfrac{ 1 }{ 20 } = 0.05 \ \\ a = 2.1 \cdot \ 10 = 21 \ \\ b = 65/10 = \dfrac{ 13 }{ 2 } = 6.5 \ \\ r = 2.5 \ \\ V = a \cdot \ b \cdot \ h = 21 \cdot \ 6.5 \cdot \ 0.05 = \dfrac{ 273 }{ 40 } = 6.825 \ \\ m = V \cdot \ r = 6.825 \cdot \ 2.5 = \dfrac{ 273 }{ 16 } = 17.0625 = 17.063 \ \text { kg }$ Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

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