```
Speed = √((2 * g * d) / f)
```
Where:
* Speed is the velocity of the car in meters per second.
* g is the acceleration due to gravity (approximately 9.8 meters per second squared).
* d is the length of the skid mark in meters.
* f is the coefficient of friction between the tires and the road surface.
In this case, we are given that the length of the skid mark is 88 meters. Assuming a coefficient of friction of 0.7 (a typical value for dry asphalt), we can calculate the speed of the car as follows:
```
Speed = √((2 * 9.8 * 88) / 0.7)
= √(1724.8 / 0.7)
≈ 52.3 meters per second
```
Converting meters per second to kilometers per hour, we get:
```
Speed = 52.3 * (18 / 5)
≈ 188.2 kilometers per hour
```
Therefore, the car was going approximately 188 kilometers per hour when the skid mark was made.
