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Mathematics distance, speed and time application problems in the fourth grade of primary school
The distance traveled by trolleys per hour.

2 16/3 = 72 (km

)

It takes time for the trolley to arrive.

936 ÷ 72 = 13 (hours)

The distance traveled by a car per hour.

3 12 ÷ 4 = 78 (km)

It takes time for the bus to arrive.

1066 ÷ 78 = 13.7 (hours)

A: the trolley will arrive first.