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30 circular plates each of radius of 14cm and thickness 3cm are placed above another to form a cylindrical solid Find 1 . TSA 2 . Volume of cylinder formed

Posted by Samir Ranjan 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

🅿🅰🆆🅰🅽 . 8 years, 2 months ago

Height of the cylinder formed = 3 × 30 = 90 cm
radius = 14 cm
Total Surface Area = 2πrh + 2πr²
= 2π × 14 × 90 + 2π × (14)²
= 7920 + 1232 = 9152 cm²
Volume = πr²h = π × (14)² × 90
= 55440 cm³

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