Back to forum
Math·Problem-Solving and Data Analysis·Ratios, rates, proportional relationships, and units
hard
For a certain rectangular region, the ratio of its length to its width is 35 to 10. The original width is 10.5. If the width of the rectangular region increases by 7, what is the change in the length that is required so that the new rectangle has the same area as the original one?
A
The length must increase by 14.7.
B
The length must decrease by 14.7.
C
The length must increase by 24.5.
D
The length must decrease by 24.5.