Question

the total surface area of a cylinder is 440 m2 find the height of cylinder of its radius is 7 m​

Answer 1

$\huge\italics{ANSWER}$

$total \: surface \: area = 440 {m}^{2}$

$tsa = 2\pi \times r(r + h)$

$2 \times 22 \div 7 \times 7(7 \times h)$

$44(7 \times h) = 440$

$7h = 440 \div 44$

$h = 10 - 7$

$h = 3m$