Question
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Answer (Detailed Solution Below)
Option 4 : 432 cm²
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Detailed Solution
सही उत्तर 432 cm² है।
Key Points
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prepsnap.in • Part -AQuestion:
The length and breadth of a rectangle are in the ratio 4 : 3. If its perimeter is 84 cm, what is its area?
1.
400 cm²
2.
448 cm²
3.
420 cm²
4.
432 cm²
Correct Answer: 432 cm²
Let the sides be 4x and 3x. Then 2(4x + 3x) = 84 gives x = 6, so the sides are 24 cm and 18 cm. Area = 24 x 18 = 432 cm². / मान लें भुजाएँ 4x और 3x हैं। 2(4x + 3x) = 84 से x = 6, अतः भुजाएँ 24 सेमी और 18 सेमी। क्षेत्रफल = 24 x 18 = 432 वर्ग सेमी।
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