Length +25%, breadth -20%. Change in area: MCQ with Answer and Explanation

Question
Length +25%, breadth -20%. Change in area:
A. 10% increase
B. 5% decrease
C. 5% increase
D. 0%
Answer: Option D
Solution (By JKSSB Mock Tests)
1.25×0.8 = 1, 0% change.
This question belongs to: Maths Percentage
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Practice More Percentage Questions

Question #1
The price of sugar increases by 20%. By what percentage should a household reduce its consumption so that the overall expenditure remains the same?
A. 25%
B. 16.67%
C. 20%
D. 18%
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Correct Answer: Option B

Explanation:
Let original price = 100 and consumption = 100. New price = 120. Required consumption for same expenditure = (100 * 100) / 120 = 83.33. Reduction = 100 - 83.33 = 16.67%.
This question belongs to: Maths Percentage
Question #2
If 25% of a number is subtracted from 30% of the same number, the result is 15. Find the number.
A. 250
B. 350
C. 300
D. 200
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Correct Answer: Option C

Explanation:
0.3x - 0.25x = 0.05x = 15 → x = 300.
This question belongs to: Maths Percentage
Question #3
What is 80 decreased by 25%?
A. 50
B. 60
C. 80
D. 70
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Correct Answer: Option B

Explanation:
25% of 80 = 20. 80 - 20 = 60.
This question belongs to: Maths Percentage
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