The distance between a and B is 60 kilometers. Xiao Wang starts from a to B at 8 a.m. at the speed of 10 kilometers per hour. After a while, Xiao Li also goes from a to B at the speed of 15 kilometers per hour. Xiao Li catches up with Xiao Wang at m on the way and informs Xiao Wang to return to a immediately. Xiao Li continues to ride to B. after arriving at a and B respectively, he returns immediately When they met again, they happened to be in m place______ It's time to start

(60 × 2) △ 15 + 10, = 120 △ 15, = 4.8 (hours); (4.8 △ 2) - [10 × (4.8 △ 2) △ 15], = 2.4-1.6, = 0.8 (hours); 0.8 = 48, 8:00 + 48 = 8:48; a: Xiao Li started at 8:48, so the answer is: 8:48

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