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The Time TT Necessary to Make an Enlargement of a Photo Negative Varies

Question 112

Multiple Choice

The time TT necessary to make an enlargement of a photo negative varies directly as the area AA of the enlargement. If 245 seconds are required to make a 5 - by- 7 in. enlargement, find the time required for a 7 - by- 10 in. enlargement.


A) 560 seconds
B) 630 seconds
C) 420 seconds
D) 490 seconds

Correct Answer:

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