Block-shaped 8378

How much paint does Peter use to paint a block-shaped sheet metal garage (without the lower base) with dimensions of 8m, 5.5m, and a height of 2.5m, if 1kg of paint is enough for a 4m square area?

Correct answer:

m =  27.875 kg

Step-by-step explanation:

a=8 m b=5.5 m c=2.5 m  h=1/4=41=0.25 kg/m2  S=2 (a+b) c+a b=2 (8+5.5) 2.5+8 5.5=2223=111.5 m2  m=h S=0.25 111.5=27.875 kg

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