Question

Find curved surface area and total surface of a cylinder when r = 7 cm and h = 12 cm

Answer 1

$\huge \mathsf{\orange {\underline {\purple {\underline { Required \ answer \ ♡ \ :- }}}}}$

Curved surface area 

= 2πrh

= 2π×12×7

= 168π

= 168×722

= 24×22

= 528cm²

Total surface area

=CSA + 2πr²

=528 + 2π×7×7

=528 + (2×7×22)

$\sf{= 528 + 308 = 836cm².}$

Answer 2

Answer:

curved surface area ➪ 528cm²

total surface area ➪ 836 cm²

Step-by-step explanation:

Curved surface area ↴

= 2πrh

= 2π×12×7

= 168π

= 168×722

= 24×22

= 528cm²

Total surface area↴

=CSA + 2πr²

=528 + 2π×7×7

=528 + (2×7×22)

$\sf{= 528 + 308 = 836cm².}=528+308=836cm².$