If a cuboidal box has height, length and width as 20 cm, 15 cm and 10 cm respectively. Then its total surface area is:
Answer & explanation
Correct answer: option 3
Formulae for total surface area = 2(lb + bh + hl)
Total surface area = 2 (20 × 15 + 20 × 10 + 10 × 15)
TSA = 2 ( 300 + 200 + 150)
= 1300 cm2