Fire tank

1428 hl of water is filled in a block-shaped fire tank with the edges of the base 12 m and 7 m. Calculate the content of water-wetted areas.

Correct result:

S =  148.6 m2

Solution:

a=12 m b=7 m V=1428 hl→ m3=1428/10  m3=142.8 m3  S1=a⋅ b=12⋅ 7=84 m2  V=S1⋅ c c=V/S1=142.8/84=1710=1.7 m  S=S1+2⋅ (a+b)⋅ c=84+2⋅ (12+7)⋅ 1.7=7435=7435 m2=148.6 m2

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