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Question : Two cubes each of edge 9 cm are joined to form a single cuboid. What is the total surface area of the cuboid formed?

Option 1: 775 cm2

Option 2: 810 cm2

Option 3: 990 cm2

Option 4: 1024 cm2


Team Careers360 21st Jan, 2024
Answer (1)
Team Careers360 24th Jan, 2024

Correct Answer: 810 cm 2


Solution : After joining two cubes, a cuboid is formed.
Then, the length of the cuboid, $l$ = 18 cm
Breadth of cuboid, $b$ = 9 cm
Height of cuboid, $h$ = 9 cm
Total surface area = $2(lb + bh + hl)$
= 2(18 × 9 + 9 × 9 + 9 × 18)
= 810 cm 2
Hence, the correct answer is 810 cm 2 .

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