Science, asked by livinglegendstrom, 8 months ago

Please answer the above question

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Answers

Answered by sweetgirl029

4

Answer:

1/f=1/v-1/u

1/f=1/15-1/20

1/f=20-15/20*15

1/f=7/60

f=60/7

Answered by Anonymous

20

Answer:

Focal length of the lens is 60/7 cm.

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