InterviewSolution
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1). 7.55 kg2). 6.34 kg3). 6.55 kg4). 7.34 kg |
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Answer» Solid sphere: RADIUS of the solid sphere = r = 6 cm Volume of the solid sphere = (4/3) πr3 = (4/3) × (22/7) × 63 = (6336/7) CM3 Weight of the solid sphere = 4.78 kg ⇒ (6336/7) cm3 volume of the given material weighs 4.78 kg. Hollow sphere: Outer DIAMETER of the hollow sphere = 16 cm ⇒ Outer radius of the hollow sphere = r1 = 16/2 = 8 cm Inner diameter of the hollow sphere = 12 cm ⇒ Inner radius of the hollow sphere = r2 = 12/2 = 6 cm Volume of the hollow sphere = (4/3) × π × (r13 – r23) = (4/3) × (22/7) × (83 - 63) = (26048/21) cm3 Weight of the hollow sphere with volume (26048/21) cm3 = [ (26048/21) × 4.78]/(6336/7) ≈ 6.55 kg ∴ Weight of the hollow sphere MADE with same material = 6.55 kg |
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