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A stone dropped into a quiet lake and waves move in circles at the speed of 5 cm/s.At the instant when the radius of the circular wave is 8cm, how fast is the enclosed area increasing? 80cm^2/s. (b)90cm^2/s(c)85cm^2/s. (d)89cm^2/s. Answer in term of piy
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A stone dropped into a quiet lake and waves move in circles at the spe...
Area of circle =πr^2=ARate of change of Area w.r.t time is given by (dA/dt) =d(πr^2)/dtdA/dt=2πr x dr/dtdr/dt =5 cm/s according to the question and r=8cmdA/dt=2π x 8 x 5=80π cm^2/secAccording to me this should be the answer hope you understand the solution
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A stone dropped into a quiet lake and waves move in circles at the speed of 5 cm/s.At the instant when the radius of the circular wave is 8cm, how fast is the enclosed area increasing? 80cm^2/s. (b)90cm^2/s(c)85cm^2/s. (d)89cm^2/s. Answer in term of piy
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A stone dropped into a quiet lake and waves move in circles at the speed of 5 cm/s.At the instant when the radius of the circular wave is 8cm, how fast is the enclosed area increasing? 80cm^2/s. (b)90cm^2/s(c)85cm^2/s. (d)89cm^2/s. Answer in term of piy for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A stone dropped into a quiet lake and waves move in circles at the speed of 5 cm/s.At the instant when the radius of the circular wave is 8cm, how fast is the enclosed area increasing? 80cm^2/s. (b)90cm^2/s(c)85cm^2/s. (d)89cm^2/s. Answer in term of piy covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A stone dropped into a quiet lake and waves move in circles at the speed of 5 cm/s.At the instant when the radius of the circular wave is 8cm, how fast is the enclosed area increasing? 80cm^2/s. (b)90cm^2/s(c)85cm^2/s. (d)89cm^2/s. Answer in term of piy .
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