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Solve the training problem of the fifth grade mathematics seedling cup competition in primary school! Hurry up ~ ~
Two cars traveled 2 1 * 3 = 63km, and it took 10-8=2 hours.

(63-9)÷2 = 27(km)- the distance of the second line.

Distance of Line A: 63-27=36 (km)

36÷2= 18 (km/h)-A walking every hour 18 km.

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