Explanation

using,v = $ω \sqrt {{ A^2 } ​ − {x^2}}$

where A = 5cm, x =4cm

$\omega = {2\pi f}$ ; $v = {2\pi f} \sqrt {{A^2 - x^2}}$

$v = 2$ x $3.14$ x10$\sqrt {{5^2} - {4^2}}$

$v =$ $2$ x $3.14$ x $10 \sqrt {{25} - {16}}$

$v =$ 1.88cm/s

in m/s we divide by 100

$v =$ 1.88m/s

using,v = $ω \sqrt {{ A^2 } ​ − {x^2}}$

where A = 5cm, x =4cm

$\omega = {2\pi f}$ ; $v = {2\pi f} \sqrt {{A^2 - x^2}}$

$v = 2$ x $3.14$ x10$\sqrt {{5^2} - {4^2}}$

$v =$ $2$ x $3.14$ x $10 \sqrt {{25} - {16}}$

$v =$ 1.88cm/s

in m/s we divide by 100

$v =$ 1.88m/s