The cast

The cast in the body of a regular quadrilateral pyramid with a base edge 60 cm long and 5 cm high is made of a material with a density of 7.8 g/cm cubic. Calculate its weight.

Correct answer:

m =  46800 g

Step-by-step explanation:

a=60 cm h=5 cm ρ=7.8 g/cm3  S=a2=602=3600 cm2  V=S h/3=3600 5/3=6000 cm3  m=ρ V=7.8 6000=46800 g

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