Class 12 Applications Of Derivatives · Mcq Single Correct1 Marksrelated_rates
Class 12 Maths · Applications Of Derivatives · Mcq Single Correct #8
Find dA/dr for a circle when r=6 cm.
✅ Step-by-Step Solution
Final Answer: Option (B): 12π cm²/cm
- A=πr², so dA/dr=2πr=12π cm²/cm.
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