Correct option is A
Given:
Each with a side of 10 cm i.e Height = 10 cm and width = 10 cm.
Formula Used:
Total surface area of cuboid = 2(LB + BH + HL)
Solution:
The length of the resulting cuboid = 2 x 10 cm = 20 cm
Total surface area of cuboid = 2(LB + BH + HL)
=> 2(20 × 10 + 10 × 10 + 10 × 20)
=> 1000 cm2