Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 22)

Surveying

22.

Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm focal length. The focal length of the combination is

10 cm

20 cm

30 cm

40 cm

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

38 comments Page 4 of 4.

Amit ami sharmA said: 9 years ago

Yes, you are correct @Lokesh.

Rashmi said: 7 years ago

Please explain me the answer.

(1)

Dev Kumavat said: 6 years ago

Thank you @Sameer Kashmiri.

Vamsi said: 8 years ago

Explain this sum cleary.

(1)

Priya said: 1 decade ago

Please explain again.

PRIYA said: 8 years ago

Explain it clearly.

Shubham Nimbal said: 8 years ago

How come 1/30?

Hariom said: 7 years ago

Yes. It is 30.

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