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?

Correct result:

m =  17.0625 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=27316 kg=17.0625 kg

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