30(x- 15)=20(x+5) This is an equation listed according to the same distance.
30x-450=20x+ 100
10x=550
x=55
The required time is 55 minutes. According to the meaning of the topic, the distance from Xiao Wang to the railway station is: 30(55- 15)= 1200 km.
Xiao Wang wants to arrive five minutes early, which means it will take time: 55-5=50 (minutes).
1200÷50=24 km
A: If Xiao Wang wants to arrive five minutes earlier, he should drive at a speed of 24 kilometers per hour.