Calculate 45563

Calculate the weight of a wooden board 18 dm long, two dm wide, and 0.3 dm thick, if you know that 1 m3 of wood weighs 660 kg.

Correct answer:

m =  7.128 kg

Step-by-step explanation:

a=18 dm m=18:10  m=1.8 m b=2 dm m=2:10  m=0.2 m c=0.3 dm m=0.3:10  m=0.03 m  ρ=660 kg/m3  V=a b c=1.8 0.2 0.03=250027=0.0108 m3  m=ρ V=660 0.0108=7.128 kg

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