Find what focal length lens should be used

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Reference no: EM13518055

A person on a safari wants to take a photograph of a hippopotamus from a distance of 78.8 m. The animal is 4.90 m long and its image is to be 1.24 cm long on the film.

(a) What focal length lens should be used?

___mm

(b) What would be the size of the image if a lens of 50.0-mm focal length were used?

___ mm

___ m

Reference no: EM13518055

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