Mathematics
NULL
Medium
Question
The ratio of the length and breadth of a rectangular field is 5 : 4. If the breadth is 20 m less than the length, the perimeter of the field is _________?
A
260m
B
280m
C
360m
✓ Official correct answer
D
None of these
Community credibility
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A
260m
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B
280m
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C
360m
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D
None of these
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Explanation
5k − 4k = 20 ⇒ k = 20. Sides 100 m and 80 m. Perimeter = 2 × 180 = 360 m.