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ICSE Class 8 Answered

50 circular plates, each of radius 7 cm and thickness 12 cm are placed one above the other to form a solid right circular cylinder. Find  the total surface area and volume of the cylinder. 
Asked by Cl_narayan | 14 Feb, 2020, 12:39: PM
answered-by-expert Expert Answer
 
 
Here, r = 7cm and h = 12 × 50 = 600 cm
 
Total surface area of a right circular cylinder = 2∏r(r + h) = 2 × (22/7) × 7 × (7 + 600) = 26708 cm2
 
 
 
Volume of a right circular cylinder = ∏r2h = (22/7) × 7 × 7 × 600 = 92400 cm3
Answered by Yasmeen Khan | 14 Feb, 2020, 03:35: PM

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