A cuboid of size 50 cm × 40 cm × 30 cm is cut into 8 identical parts by 3 cuts. What is the total surface area (in cm²) of all the 8 parts ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 ie 18,800.
T.S.A = 8 × (T.S.A of 1 part)
= 8 × 2(lb + bh + lh)
= 8 × 2(20 × 25 + 25 × 15 + 15 × 20)
= 8 × 2(1175)
= 18,800