A closed wooden box 80cm long,65cm wide,and 45 cm high is made up of wood of 2.5 cm thick find the weight and capacity
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volume of wooden box = length×breadth×height
= 80×65×45 = 234000cm^3
weight of 100cm^3 wooden box = 8 g
weight of 234000cm^3 box = 8/100 ×234000
= 18720g
convert into kg
18.72 kg
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