यदि एक वृत्त की त्रिज्या को दोगुना कर दिया जाए तो उसका
क्षेत्रफल बढ़ जाता है-
(a) 100%
(b) 200%
(c) 300%
(d) 400%
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please write in English I can't understand Hindi
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Answer:
hello its answer (d) because area increases 4x
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