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ഒരു ദർപ്പണത്തിന്റെ ഫോക്ക്ദൂരം 10 cm ആയാൽ വക്രത ആരം എത്ര ? 

A20 cm

B5 cm

C2.5 cm

D10 cm

Answer:

A. 20 cm

Read Explanation:

  • R=2F

  • R=2 X 10 =20 cm


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