Xiao Li, who lives in Chengdu, will go to Mianyang with Chengdu within the specified time. If he drives at 50 kilometers per hour, he will be 24 minutes late. if

Solution: Let this specified time be t minutes, then 50X(t+24)=75X(t-24),

T= 120, Chengdu is 50x (120+24) = 7200km away from Mianyang.

The required speed v = 7200/120 = 60 km/h.