Question

Please help! I highly appreciate it! :D

Answer 1

Here's some required measures !

• 1 ft = 12 inches

• 0.4 ft = 0.5 × 12 = 6 inches

Let's calculate its surface area ~

• $\sf2[(12 \times 10) + (11 \times 12) + (10 \times 11) ] - 2(7 \times 7)$

• $\sf2[120 + 132 + 110 ] - 2(49)$

• $\sf{2(362)} - 98$

• $\sf724 - 98$

• $6 \sf26 \: \: in {}^{2}$