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Shortcut used: Reduce the ratio first, then scale both terms by the same multiplier.
Solve in 3 steps:
- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Common mistake: Do not scale only one side of the ratio.
Question 7
Multiple Choice Question
Question
Find the total surface area of a cuboid with length 10 cm, breadth 6 cm and height 4 cm.
Explanation
Correct Answer: C
ANSWER
Correct Answer: C
Method / Topic: Mensuration
The total surface area is 248 cm².
Why this answer is correct
The answer keeps the ratio proportional.
Short Explanation
The total surface area is 248 cm².
Detailed Explanation
Question
Find the total surface area of a cuboid with length 10 cm, breadth 6 cm and height 4 cm.
ANSWER
Correct Answer: C
Method / Topic: Mensuration
TSA = 2(lb+bh+hl) = 2(10×6+6×4+4×10)=2(60+24+40)=248 cm².
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Question 7
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Shortcut used, common trap, and the fastest solving route
Shortcut used: Reduce the ratio first, then scale both terms by the same multiplier.
Solve in 3 steps:
- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Common mistake: Do not scale only one side of the ratio.
Question
Find the total surface area of a cuboid with length 10 cm, breadth 6 cm and height 4 cm.
Explanation
Correct Answer: C
ANSWER
Correct Answer: C
Method / Topic: Mensuration
The total surface area is 248 cm².
Why this answer is correct
The answer keeps the ratio proportional.
Short Explanation
The total surface area is 248 cm².
Detailed Explanation
Question
Find the total surface area of a cuboid with length 10 cm, breadth 6 cm and height 4 cm.
ANSWER
Correct Answer: C
Method / Topic: Mensuration
TSA = 2(lb+bh+hl) = 2(10×6+6×4+4×10)=2(60+24+40)=248 cm².
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