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=120=0.05 a=2.1⋅ 10=21 b=65/10=132=6.5 r=2.5 V=a⋅ b⋅ h=21⋅ 6.5⋅ 0.05=27340=6.825 m=V⋅ r=6.825⋅ 2.5=27316=17.0625=17.063  kg 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 }

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