Mathematics
NULL
Medium
Question
A rectangular field has area 150 m² and perimeter 50 m. Its length and breadth must be ________?
A
12 m, 10 m
B
13 m, 12 m
C
14 m, 11 m
D
15 m, 10 m
✓ Official correct answer
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A
12 m, 10 m
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B
13 m, 12 m
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C
14 m, 11 m
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D
15 m, 10 m
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Explanation
l + b = 25, lb = 150 ⇒ roots of x² − 25x + 150 = 0 are 15 m and 10 m.