Question

TSA of a cylinder of radius 7 cm and 836 cm^2 square find height and later surface area​

Answer 1

Given:

radius of the circle, R= 7cm

TSA = 836 cm²

=> 2πR(R + h) = 836

=> 2× 22/7 × 7(7 + h) = 836

=> 44(7 + h) = 836

=> 308 + 44h = 836

=> 44h = 528

=> h = 528/44 = 12cm

Lateral Surface Area => 2πRh

2 × 22/7 × 7 × 12 = 2 × 22 × 12

= 528 cm²

Answer 2

Answer:

radius = 7 cm

TSA = 836 cm sq.

$tota l \: surface \: area \: = 2\pi \: r \: (r + h)$

$836 = 2 \frac{22}{7} 7(7 + h)$

$\frac{836 \times 7}{2 \times 22 \times 7} = 7 + h$

$19 = 7 + h$

$h = 12cm$

lateral surface area = 2 π r h

$2 \times \frac{22}{7} \times 7 \times 12$

$528 {cm}^{2}$

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