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Let radius and height of each cylinder be ‘r’ cm. So, radius of sphere = 4r cm Volume of sphere = 81 × volume of each cylinder => (4/3)π(3r)3 = 81 × π × r2 × 4 => 9r = 81 => r = 9 So, required radius = 3r = 27 cm
5, 5, 15, 75, ?, 4725
8, 24, 48, 80, ?, 168
8 13 36 123 ? 2585
250, 279, 311, 349, 396, ?
840, 2520, 630, 3150, ?, 3675
12, 24, 46, 78, 120, ?
81, 41, 42, 64.5, ?, 330
8, 58, 75, 94, 115, ?
200 ? 96 38.4 7.68 0