Cuboid 5

Calculate the mass of the cuboid with dimensions of 12 cm; 0.8 dm and 100 mm made from spruce wood (density = 550 kg/m3).

Correct result:

m =  0.528 kg

Solution:

a=12 cm→ m=12/100  m=0.12 m b=0.8 dm→ m=0.8/10  m=0.08 m c=100 mm→ m=100/1000  m=0.1 m  h=550 kg/m3  V=a⋅ b⋅ c=0.12⋅ 0.08⋅ 0.1=33125≐0.001 m3  m=h⋅ V=550⋅ 0.001=66125=66125 kg=0.528 kg

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Showing 2 comments:
#
Math student
You asked for the weight... in physics, weight is expressed in N not kg. You should know this!

#
Dr Math
Thank you, we have corrected 'weight' to 'mass'.

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