SOLUTION: The time T necessary to make an enlargement of a photo of negative varies directly as the area A of the enlargement. If 180 seconds are required to make a 5-by-7 enlargement, find
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Question 1054438: The time T necessary to make an enlargement of a photo of negative varies directly as the area A of the enlargement. If 180 seconds are required to make a 5-by-7 enlargement, find the time required for 6-by-6 enlargement.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
180 seconds=k*35 (the square inches in 5*7)
k=180/35
x seconds=k*36=(180/35)*36
x=185.14 seconds.
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