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 * 10) + (11 * 12) + (10 * 11) ] - 2(7 * 7)`

• 
  `\sf2[120 + 132 + 110 ] - 2(49)`

• 
  `\sf{2(362)} - 98`

• 
  `\sf724 - 98`

• 
  `6 \sf26 \: \: in {}^(2)`