Question

how many square feet of plywood will be needed to build an open-top bin if it is to be 3 ft wide,5 ft long, and 2 ft high

Answer 1

it's an open bin so the top area will be subtracted from the total surface area of the bin

so, outer surface area of the bin is

=2(lb+bh+hl)-lb

=2(3×5+5×2+2×3)-3×5

=2(15+10+6)-15

=2×31-15

=62-15

=47 sqft

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