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## #1 2017-11-23 16:26:19

**shakeel123****Moderator**- Registered: 2017-09-21
- Posts: 50,796

### If the radius of a circle is decreased by 50%, its area is reduce...

# Armed Forces Police Math Exams Quizzes MCQs Quizzes Armed Forces Percentage

**Question:**

If the radius of a circle is decreased by 50%, its area is reduced by:

**Option A):**

25%**Option B):**

75%**Option C):**

50%**Option D):**

None of these

**Correct Answer is Option B):**

75%

**Explanation:****Solution:**

New radius = 50% of R = 50/100 R = R/2

New Area = π x (R/2)² = πR²/4

Decrease = (πR² - πR²/4) = 3πR²/4

Decrease % = (3πR²/4 x 3πR² x 100) % = 75%

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## 2017-11-23 16:26:19

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### Re: If the radius of a circle is decreased by 50%, its area is reduce...

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