alleryA 20 cm wire is bent into a rectangle 4 cm wide. What is its length?
A5 cm
B6 cm
C4 cm
D8 cm
Answer & Solution
Correct answer: B. 6 cm
1. The wire forms the perimeter, so length plus width is 20 divided by 2, which is 10.
2. The width is 4 cm.
3. So the length is 10 minus 4, which is 6 cm.
_Source: syllabus Mathematics, 'Math-Magic', Ch 11 'Area and its Boundary'_
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