A train can travel 60% faster than a car.

Step 1: Let the speed of the car be $x$ km/h.

Then the speed of the train = $1.6x$ km/h.

Step 2: Time taken to travel 60 km without stops:

• Car: $60 / x$ hours

• Train: $60 / 1.6x = 37.5 / x$ hours

Step 3: Train loses 20 minutes = 1/3 hour due to stops.

Time for train with stops = $37.5 / x + 1/3$ hours

Since both reach simultaneously:

$60 / x = 37.5 / x + 1/3$

Step 4: Solve for $x$:

$60 / x - 37.5 / x = 1/3$

$22.5 / x = 1/3$

$x = 22.5 \cdot 3 = 67.5$

So, the speed of the car is 67.5 km/h.