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Speed of wave

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A transverse wave on a string is described by the equation
y(x,t) = (2.20cm) sin [(130 rad/s)t+ (15rad/m)x]
We have to find the speed of wave moving along the string .

I tried as
$\omega = 130 , k=15 =\omega /v =(130)/(v) $ and v =26

But the answer is given as 8.7 m/s

asked Jan 3, 2017 in Physics Problems by koolman (4,286 points)
reshown May 16 by sammy gerbil
Check your arithmetic. $130/26$ is not equal to $15$.

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