C. 7 cm / 7 cm
ExplanationVolume πr²h = 22/7 × 49 × h = 154h so h = 1078/154 = 7 cm.
आयतन πr²h = 22/7 × 49 × h = 154h है इसलिए h = 1078/154 = 7 cm।
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