If the radius of a circle is decreased by 30%, the area decreases by: MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Percentage Questions
Question #1
Report Error
A man spends 70% of his income. If his income increases by 20% and his expenditure increases by 10%, what is the percentage increase in his savings?
Correct Answer: Option C
Explanation:
Let income = 100, expenditure = 70, savings = 30. New income = 120. New expenditure = 77. New savings = 120 - 77 = 43. Increase in savings = 43 - 30 = 13. Percentage increase = (13 / 30) * 100% = 43.33%.
Let income = 100, expenditure = 70, savings = 30. New income = 120. New expenditure = 77. New savings = 120 - 77 = 43. Increase in savings = 43 - 30 = 13. Percentage increase = (13 / 30) * 100% = 43.33%.
This question belongs to:
Maths
Percentage
Question #2
Report Error
Income Rs. 25000, spends 64%. Income rises 20%, savings to increase 50%. % increase in expenditure:
Correct Answer: Option D
Explanation:
Initial: inc 25000, exp 16000, sav 9000. New inc 30000, sav 13500, exp 16500. Increase 500 on 16000 = 3.125%.
Initial: inc 25000, exp 16000, sav 9000. New inc 30000, sav 13500, exp 16500. Increase 500 on 16000 = 3.125%.
This question belongs to:
Maths
Percentage
Question #3
Report Error
A person buys an article at 20% discount on the marked price and sells it at the marked price. What is his profit percent?
Correct Answer: Option A
Explanation:
Let MP=100, CP=80, SP=100, profit% = (20/80)×100 = 25%.
Let MP=100, CP=80, SP=100, profit% = (20/80)×100 = 25%.
This question belongs to:
Maths
Percentage
No comments yet. Be the first to start the discussion!