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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 10
Multiple Choice Question
Question
Find the area of a 90° sector of a circle with radius 14 cm. Use π=22/7.
Explanation
Correct Answer: A
ANSWER
Correct Answer: A
Method / Topic: Mensuration
The area is 154 cm².
Why this answer is correct
The answer keeps the ratio proportional.
Short Explanation
The area is 154 cm².
Detailed Explanation
Question
Find the area of a 90° sector of a circle with radius 14 cm. Use π=22/7.
ANSWER
Correct Answer: A
Method / Topic: Mensuration
A 90-degree sector is one-fourth of a circle. Applying one-fourth of πr² gives 154 cm².
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Question 10
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 area of a 90° sector of a circle with radius 14 cm. Use π=22/7.
Explanation
Correct Answer: A
ANSWER
Correct Answer: A
Method / Topic: Mensuration
The area is 154 cm².
Why this answer is correct
The answer keeps the ratio proportional.
Short Explanation
The area is 154 cm².
Detailed Explanation
Question
Find the area of a 90° sector of a circle with radius 14 cm. Use π=22/7.
ANSWER
Correct Answer: A
Method / Topic: Mensuration
A 90-degree sector is one-fourth of a circle. Applying one-fourth of πr² gives 154 cm².
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