Calculating speed of light in substance

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To calculate the speed of light in a transparent substance when a light ray transitions from water, Snell's law is applied using the angles of incidence and refraction. Given that the angle of incidence is 37 degrees and the angle of refraction is 25 degrees, the index of refraction for water is approximately 1.3. The index of refraction for the new medium can be determined using the formula n1 * sin(θ1) = n2 * sin(θ2). Once the index of refraction for the transparent substance is found, the speed of light in that medium can be calculated using the relationship between the speed of light in a vacuum and the index of refraction. This approach allows for the determination of the speed of light in the new medium effectively.
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A light ray initially in water enters a transparent substance at an angle of incidence of 37 degrees, and the transmitted ray is refracted at an an angle of 25 degrees. calculate the speed of light in the transparent substace.

I have my diagram drawn out, however i do not see how to solve for V (speed) using angles and what i have. I do not know which equations to use, very confuzed.
 
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Use Snell's law. You'll find the index of refraction of the medium and then the speed of light in the medium (see definition of index of refraction).
The index of water is supposed to be known (about 1.3)
 

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