alleryStart learning →A rectangle is 8 cm long and w cm wide, with w>0. If its perimeter is at most 30 cm, what is its greatest possible width?
A7 cm
B15 cm
C11 cm
D14 cm
Answer & Solution
Correct answer: A. 7 cm
The perimeter condition is 2(8+w)≤30, giving w≤7. The boundary w=7 is positive and produces perimeter 30 cm.
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