SOLUTION: A large photograph is placed onto a rectangular backing sheet. the dimensions 100 cm by 50 cm. the border is the same width all the way around. determine the width of the border if

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Question 1035915: A large photograph is placed onto a rectangular backing sheet. the dimensions 100 cm by 50 cm. the border is the same width all the way around. determine the width of the border if the area of the border is 1400 cm2
Answer by josgarithmetic(39617) About Me  (Show Source):
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You can use this video for understanding how to solve this type of problem:
Rectangular, outside border area