Question

The area of the cardboard needed to make a box of size 25 cm x 15 cm x 8 cm will be 

A. 390 cm² 

B. 1390 cm² 

C. 2780 cm² 

D. 1000 cm²

Answer 1

We know that, 

Surface area of cuboid = 2 (lb + bh + hl) 

Therefore, 

Area of the cardboard required to make a box = 2 (23 × 15 + 15 × 8 + 25 × 8) 

= 2 (375 + 120 + 200) 

= 1390 cm² 

Hence, option B is correct